74307868857 has 14 divisors (see below), whose sum is σ = 111410838762. Its totient is φ = 49538578752.

The previous prime is 74307868807. The next prime is 74307868909. The reversal of 74307868857 is 75886870347.

74307868857 is a `hidden beast` number, since 7 + 430 + 78 + 6 + 88 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43762966416 + 30544902441 = 209196^2 + 174771^2 .

It is not a de Polignac number, because 74307868857 - 2¹⁶ = 74307803321 is a prime.

It is a super-2 number, since 2×74307868857² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74307868794 and 74307868803.

It is not an unprimeable number, because it can be changed into a prime (74307868807) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 50964888 + ... + 50966345.

Almost surely, 2^74307868857 is an apocalyptic number.

It is an amenable number.

74307868857 is a deficient number, since it is larger than the sum of its proper divisors (37102969905).

74307868857 is an equidigital number, since it uses as much as digits as its factorization.

74307868857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101931251 (or 101931236 counting only the distinct ones).

The product of its (nonzero) digits is 63221760, while the sum is 63.

The spelling of 74307868857 in words is "seventy-four billion, three hundred seven million, eight hundred sixty-eight thousand, eight hundred fifty-seven".