57151550920 has 32 divisors (see below), whose sum is σ = 134181904320. Its totient is φ = 21866680000.

The previous prime is 57151550909. The next prime is 57151550923. The reversal of 57151550920 is 2905515175.

It is a happy number.

It is a super-2 number, since 2×57151550920² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (57151550923) 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, 31059706 + ... + 31061545.

It is an arithmetic number, because the mean of its divisors is an integer number (4193184510).

Almost surely, 2^57151550920 is an apocalyptic number.

It is an amenable number.

57151550920 is an abundant number, since it is smaller than the sum of its proper divisors (77030353400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57151550920 is a wasteful number, since it uses less digits than its factorization.

57151550920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62121285 (or 62121281 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 40.

The spelling of 57151550920 in words is "fifty-seven billion, one hundred fifty-one million, five hundred fifty thousand, nine hundred twenty".