8920972557 has 16 divisors (see below), whose sum is σ = 15104292480. Its totient is φ = 5097698496.

The previous prime is 8920972531. The next prime is 8920972589. The reversal of 8920972557 is 7552790298.

8920972557 is a `hidden beast` number, since 89 + 2 + 0 + 9 + 7 + 2 + 557 = 666.

It is not a de Polignac number, because 8920972557 - 2⁸ = 8920972301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8920972507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23600268 + ... + 23600645.

It is an arithmetic number, because the mean of its divisors is an integer number (944018280).

Almost surely, 2^8920972557 is an apocalyptic number.

It is an amenable number.

8920972557 is a deficient number, since it is larger than the sum of its proper divisors (6183319923).

8920972557 is a wasteful number, since it uses less digits than its factorization.

8920972557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47200929 (or 47200923 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The square root of 8920972557 is about 94450.9002445186. The cubic root of 8920972557 is about 2073.9776301504.

The spelling of 8920972557 in words is "eight billion, nine hundred twenty million, nine hundred seventy-two thousand, five hundred fifty-seven".