55651666500 has 72 divisors (see below), whose sum is σ = 175562471448. Its totient is φ = 14840443200.

The previous prime is 55651666487. The next prime is 55651666523. The reversal of 55651666500 is 566615655.

It can be written as a sum of positive squares in 4 ways, for example, as 4743684 + 55646922816 = 2178^2 + 235896^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6179019 + ... + 6188018.

It is an arithmetic number, because the mean of its divisors is an integer number (2438367659).

Almost surely, 2^55651666500 is an apocalyptic number.

55651666500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55651666500 is an abundant number, since it is smaller than the sum of its proper divisors (119910804948).

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

55651666500 is a wasteful number, since it uses less digits than its factorization.

55651666500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12367062 (or 12367047 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 55651666500 in words is "fifty-five billion, six hundred fifty-one million, six hundred sixty-six thousand, five hundred".