55532991813 has 16 divisors (see below), whose sum is σ = 79874182080. Its totient is φ = 34116505344.

The previous prime is 55532991797. The next prime is 55532991863. The reversal of 55532991813 is 31819923555.

It is not a de Polignac number, because 55532991813 - 2⁴ = 55532991797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55532991863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177483 + ... + 1223736.

It is an arithmetic number, because the mean of its divisors is an integer number (4992136380).

Almost surely, 2^55532991813 is an apocalyptic number.

It is an amenable number.

55532991813 is a deficient number, since it is larger than the sum of its proper divisors (24341190267).

55532991813 is a wasteful number, since it uses less digits than its factorization.

55532991813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401828.

The product of its digits is 1458000, while the sum is 51.

The spelling of 55532991813 in words is "fifty-five billion, five hundred thirty-two million, nine hundred ninety-one thousand, eight hundred thirteen".