56644016502640 has 80 divisors (see below), whose sum is σ = 150519302005248. Its totient is φ = 19419765896448.

The previous prime is 56644016502539. The next prime is 56644016502653. The reversal of 56644016502640 is 4620561044665.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7797739 + ... + 13194421.

Almost surely, 2^{56644016502640} is an apocalyptic number.

It is an amenable number.

56644016502640 is an abundant number, since it is smaller than the sum of its proper divisors (93875285502608).

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

56644016502640 is a wasteful number, since it uses less digits than its factorization.

56644016502640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5415446 (or 5415440 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 56644016502640 in words is "fifty-six trillion, six hundred forty-four billion, sixteen million, five hundred two thousand, six hundred forty".