57511943616 has 56 divisors (see below), whose sum is σ = 152189352720. Its totient is φ = 19167834112.

The previous prime is 57511943611. The next prime is 57511943627. The reversal of 57511943616 is 61634911575.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57511943611) 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, 1600600 + ... + 1636136.

Almost surely, 2^57511943616 is an apocalyptic number.

It is an amenable number.

57511943616 is an abundant number, since it is smaller than the sum of its proper divisors (94677409104).

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

57511943616 is a wasteful number, since it uses less digits than its factorization.

57511943616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43981 (or 43971 counting only the distinct ones).

The product of its digits is 680400, while the sum is 48.

The spelling of 57511943616 in words is "fifty-seven billion, five hundred eleven million, nine hundred forty-three thousand, six hundred sixteen".