57551655840 has 192 divisors, whose sum is σ = 219373588224. Its totient is φ = 12380848128.

The previous prime is 57551655797. The next prime is 57551655869. The reversal of 57551655840 is 4855615575.

It is a happy number.

It is a super-2 number, since 2×57551655840² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446659 + ... + 560898.

It is an arithmetic number, because the mean of its divisors is an integer number (1142570772).

Almost surely, 2^57551655840 is an apocalyptic number.

It is an amenable number.

57551655840 is an abundant number, since it is smaller than the sum of its proper divisors (161821932384).

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

57551655840 is a wasteful number, since it uses less digits than its factorization.

57551655840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007599 (or 1007591 counting only the distinct ones).

The product of its (nonzero) digits is 4200000, while the sum is 51.

The spelling of 57551655840 in words is "fifty-seven billion, five hundred fifty-one million, six hundred fifty-five thousand, eight hundred forty".