Search a number
-
+
68692697580 = 22351397907913
BaseRepresentation
bin111111111110011001…
…110110000111101100
320120022022102121002110
4333332121312013230
52111140312310310
651320150524020
74651161203223
oct777631660754
9216268377073
1068692697580
1127150267451
1211391066610
136629653920
143479153cba
151bc097bd20
hexffe6761ec

68692697580 has 96 divisors (see below), whose sum is σ = 209270545344. Its totient is φ = 16734633984.

The previous prime is 68692697569. The next prime is 68692697597. The reversal of 68692697580 is 8579629686.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378297 + ... + 529616.

It is an arithmetic number, because the mean of its divisors is an integer number (2179901514).

Almost surely, 268692697580 is an apocalyptic number.

68692697580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68692697580 is an abundant number, since it is smaller than the sum of its proper divisors (140577847764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68692697580 is a wasteful number, since it uses less digits than its factorization.

68692697580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908035 (or 908033 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 66.

The spelling of 68692697580 in words is "sixty-eight billion, six hundred ninety-two million, six hundred ninety-seven thousand, five hundred eighty".

Divisors: 1 2 3 4 5 6 10 12 13 15 20 26 30 39 52 60 65 78 97 130 156 194 195 260 291 388 390 485 582 780 970 1164 1261 1455 1940 2522 2910 3783 5044 5820 6305 7566 12610 15132 18915 25220 37830 75660 907913 1815826 2723739 3631652 4539565 5447478 9079130 10894956 11802869 13618695 18158260 23605738 27237390 35408607 47211476 54474780 59014345 70817214 88067561 118028690 141634428 176135122 177043035 236057380 264202683 352270244 354086070 440337805 528405366 708172140 880675610 1056810732 1144878293 1321013415 1761351220 2289756586 2642026830 3434634879 4579513172 5284053660 5724391465 6869269758 11448782930 13738539516 17173174395 22897565860 34346348790 68692697580