285171792957 has 12 divisors (see below), whose sum is σ = 412249990620. Its totient is φ = 189959830848.

The previous prime is 285171792953. The next prime is 285171792977. The reversal of 285171792957 is 759297171582.

285171792957 is a `hidden beast` number, since 28 + 517 + 1 + 7 + 9 + 2 + 95 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 280363896036 + 4807896921 = 529494^2 + 69339^2 .

It is not a de Polignac number, because 285171792957 - 2² = 285171792953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285171792894 and 285171792903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285171792953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12879808 + ... + 12901929.

It is an arithmetic number, because the mean of its divisors is an integer number (34354165885).

Almost surely, 2^285171792957 is an apocalyptic number.

It is an amenable number.

285171792957 is a deficient number, since it is larger than the sum of its proper divisors (127078197663).

285171792957 is a wasteful number, since it uses less digits than its factorization.

285171792957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25782972 (or 25782969 counting only the distinct ones).

The product of its digits is 22226400, while the sum is 63.

The spelling of 285171792957 in words is "two hundred eighty-five billion, one hundred seventy-one million, seven hundred ninety-two thousand, nine hundred fifty-seven".