74902931857 has 8 divisors (see below), whose sum is σ = 82632128040. Its totient is φ = 67454797440.

The previous prime is 74902931843. The next prime is 74902931863. The reversal of 74902931857 is 75813920947.

It is a happy number.

It is a Cunningham number, because it is equal to 273684²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 3609125776 + 71293806081 = 60076^2 + 267009^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74902931857 - 2²³ = 74894543249 is a prime.

It is a super-2 number, since 2×74902931857² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74902931798 and 74902931807.

It is not an unprimeable number, because it can be changed into a prime (74902931897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70264882 + ... + 70265947.

It is an arithmetic number, because the mean of its divisors is an integer number (10329016005).

Almost surely, 2^74902931857 is an apocalyptic number.

It is an amenable number.

74902931857 is a deficient number, since it is larger than the sum of its proper divisors (7729196183).

74902931857 is a wasteful number, since it uses less digits than its factorization.

74902931857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140530883.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 74902931857 in words is "seventy-four billion, nine hundred two million, nine hundred thirty-one thousand, eight hundred fifty-seven".