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68698286972 = 22710159241511
BaseRepresentation
bin111111111110101111…
…001010101101111100
320120022200221120021222
4333332233022231330
52111143230140342
651320510412512
74651256542640
oct777657125574
9216280846258
1068698286972
1127153434887
1211392b01138
13662a85ca63
143479baac20
151bc11d2ed2
hexffebcab7c

68698286972 has 24 divisors (see below), whose sum is σ = 137410667520. Its totient is φ = 29439102960.

The previous prime is 68698286939. The next prime is 68698286981. The reversal of 68698286972 is 27968289686.

It is a junction number, because it is equal to n+sod(n) for n = 68698286896 and 68698286905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163697 + ... + 405207.

It is an arithmetic number, because the mean of its divisors is an integer number (5725444480).

Almost surely, 268698286972 is an apocalyptic number.

It is an amenable number.

68698286972 is an abundant number, since it is smaller than the sum of its proper divisors (68712380548).

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

68698286972 is a wasteful number, since it uses less digits than its factorization.

68698286972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251681 (or 251679 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 71.

The spelling of 68698286972 in words is "sixty-eight billion, six hundred ninety-eight million, two hundred eighty-six thousand, nine hundred seventy-two".

Divisors: 1 2 4 7 14 28 10159 20318 40636 71113 142226 241511 284452 483022 966044 1690577 3381154 6762308 2453510249 4907020498 9814040996 17174571743 34349143486 68698286972