57664665520 has 160 divisors (see below), whose sum is σ = 167353145856. Its totient is φ = 17951846400.

The previous prime is 57664665497. The next prime is 57664665563. The reversal of 57664665520 is 2556646675.

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, 5581960 + ... + 5592280.

Almost surely, 2^57664665520 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 57664665520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83676572928).

57664665520 is an abundant number, since it is smaller than the sum of its proper divisors (109688480336).

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

57664665520 is a wasteful number, since it uses less digits than its factorization.

57664665520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11259 (or 11253 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 52.

It can be divided in two parts, 576646655 and 20, that added together give a palindrome (576646675).

The spelling of 57664665520 in words is "fifty-seven billion, six hundred sixty-four million, six hundred sixty-five thousand, five hundred twenty".