8557161525 has 72 divisors (see below), whose sum is σ = 16748151264. Its totient is φ = 4141987200.

The previous prime is 8557161517. The next prime is 8557161541. The reversal of 8557161525 is 5251617558.

8557161525 is a `hidden beast` number, since 8 + 5 + 5 + 7 + 1 + 615 + 25 = 666.

It is not a de Polignac number, because 8557161525 - 2³ = 8557161517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1673022 + ... + 1678128.

It is an arithmetic number, because the mean of its divisors is an integer number (232613212).

Almost surely, 2^8557161525 is an apocalyptic number.

It is an amenable number.

8557161525 is a deficient number, since it is larger than the sum of its proper divisors (8190989739).

8557161525 is a wasteful number, since it uses less digits than its factorization.

8557161525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811 (or 5803 counting only the distinct ones).

The product of its digits is 420000, while the sum is 45.

The square root of 8557161525 is about 92504.9270309425. The cubic root of 8557161525 is about 2045.3921112122.

The spelling of 8557161525 in words is "eight billion, five hundred fifty-seven million, one hundred sixty-one thousand, five hundred twenty-five".