656132562550 has 36 divisors (see below), whose sum is σ = 1223615003940. Its totient is φ = 261764842960.

The previous prime is 656132562541. The next prime is 656132562571. The reversal of 656132562550 is 55265231656.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 656132562550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7289721 + ... + 7379179.

It is an arithmetic number, because the mean of its divisors is an integer number (33989305665).

Almost surely, 2^656132562550 is an apocalyptic number.

656132562550 is a deficient number, since it is larger than the sum of its proper divisors (567482441390).

656132562550 is an equidigital number, since it uses as much as digits as its factorization.

656132562550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90237 (or 89849 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 656132562550 in words is "six hundred fifty-six billion, one hundred thirty-two million, five hundred sixty-two thousand, five hundred fifty".