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68942759638 = 2109643491837
BaseRepresentation
bin100000000110101001…
…1110000011011010110
320120221201222001202011
41000031103300123112
52112143321302023
651401042334434
74660315534144
oct1001523603326
9216851861664
1068942759638
1127269432805
121144095a41a
1366693b863c
1434a0448594
151bd78c450d
hex100d4f06d6

68942759638 has 16 divisors (see below), whose sum is σ = 104525411760. Its totient is φ = 34101940896.

The previous prime is 68942759629. The next prime is 68942759651. The reversal of 68942759638 is 83695724986.

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, 105745 + ... + 386092.

It is an arithmetic number, because the mean of its divisors is an integer number (6532838235).

Almost surely, 268942759638 is an apocalyptic number.

68942759638 is a deficient number, since it is larger than the sum of its proper divisors (35582652122).

68942759638 is a wasteful number, since it uses less digits than its factorization.

68942759638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492591.

The product of its digits is 156764160, while the sum is 67.

The spelling of 68942759638 in words is "sixty-eight billion, nine hundred forty-two million, seven hundred fifty-nine thousand, six hundred thirty-eight".

Divisors: 1 2 109 218 643 1286 70087 140174 491837 983674 53610233 107220466 316251191 632502382 34471379819 68942759638