656007021550 has 12 divisors (see below), whose sum is σ = 1220173060176. Its totient is φ = 262402808600.

The previous prime is 656007021547. The next prime is 656007021583. The reversal of 656007021550 is 55120700656.

656007021550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6560070166 + ... + 6560070265.

It is an arithmetic number, because the mean of its divisors is an integer number (101681088348).

Almost surely, 2^656007021550 is an apocalyptic number.

656007021550 is a deficient number, since it is larger than the sum of its proper divisors (564166038626).

656007021550 is a wasteful number, since it uses less digits than its factorization.

656007021550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13120140443 (or 13120140438 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 656007021550 in words is "six hundred fifty-six billion, seven million, twenty-one thousand, five hundred fifty".