56665511600128 has 56 divisors (see below), whose sum is σ = 113411907288000. Its totient is φ = 28310804152320.

The previous prime is 56665511600083. The next prime is 56665511600167. The reversal of 56665511600128 is 82100611556665.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7896873 + ... + 13254871.

Almost surely, 2^{56665511600128} 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 56665511600128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56705953644000).

56665511600128 is an abundant number, since it is smaller than the sum of its proper divisors (56746395687872).

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

56665511600128 is an equidigital number, since it uses as much as digits as its factorization.

56665511600128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5359316 (or 5359292 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 56665511600128 in words is "fifty-six trillion, six hundred sixty-five billion, five hundred eleven million, six hundred thousand, one hundred twenty-eight".