551660611656 has 64 divisors (see below), whose sum is σ = 1719461652480. Its totient is φ = 143288470080.

The previous prime is 551660611597. The next prime is 551660611669. The reversal of 551660611656 is 656116066155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149256976 + ... + 149260671.

It is an arithmetic number, because the mean of its divisors is an integer number (26866588320).

Almost surely, 2^551660611656 is an apocalyptic number.

551660611656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

551660611656 is an abundant number, since it is smaller than the sum of its proper divisors (1167801040824).

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

551660611656 is a wasteful number, since it uses less digits than its factorization.

551660611656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298517674 (or 298517670 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 551660611656 in words is "five hundred fifty-one billion, six hundred sixty million, six hundred eleven thousand, six hundred fifty-six".