57556665576 has 96 divisors (see below), whose sum is σ = 157547655720. Its totient is φ = 18980928000.

The previous prime is 57556665571. The next prime is 57556665577. The reversal of 57556665576 is 67556665575.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33368328900 + 24188336676 = 182670^2 + 155526^2 .

It is not an unprimeable number, because it can be changed into a prime (57556665571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13531066 + ... + 13535318.

Almost surely, 2^57556665576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57556665576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78773827860).

57556665576 is an abundant number, since it is smaller than the sum of its proper divisors (99990990144).

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

57556665576 is a wasteful number, since it uses less digits than its factorization.

57556665576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6227 (or 6220 counting only the distinct ones).

The product of its digits is 198450000, while the sum is 63.

Subtracting 57556665576 from its reverse (67556665575), we obtain a palindrome (9999999999).

The spelling of 57556665576 in words is "fifty-seven billion, five hundred fifty-six million, six hundred sixty-five thousand, five hundred seventy-six".