55991334630 has 64 divisors (see below), whose sum is σ = 167537714688. Its totient is φ = 11634562560.

The previous prime is 55991334613. The next prime is 55991334643. The reversal of 55991334630 is 3643319955.

It is a self number, because there is not a number n which added to its sum of digits gives 55991334630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12117027 + ... + 12121646.

It is an arithmetic number, because the mean of its divisors is an integer number (2617776792).

Almost surely, 2^55991334630 is an apocalyptic number.

55991334630 is an abundant number, since it is smaller than the sum of its proper divisors (111546380058).

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

55991334630 is a wasteful number, since it uses less digits than its factorization.

55991334630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24238701.

The product of its (nonzero) digits is 1312200, while the sum is 48.

The spelling of 55991334630 in words is "fifty-five billion, nine hundred ninety-one million, three hundred thirty-four thousand, six hundred thirty".