55440333631 has 4 divisors (see below), whose sum is σ = 55441162192. Its totient is φ = 55439505072.

The previous prime is 55440333593. The next prime is 55440333661. The reversal of 55440333631 is 13633304455.

55440333631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55440333631 - 2²⁷ = 55306115903 is a prime.

It is a super-2 number, since 2×55440333631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55440333661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304155 + ... + 450988.

It is an arithmetic number, because the mean of its divisors is an integer number (13860290548).

Almost surely, 2^55440333631 is an apocalyptic number.

55440333631 is a deficient number, since it is larger than the sum of its proper divisors (828561).

55440333631 is an equidigital number, since it uses as much as digits as its factorization.

55440333631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828560.

The product of its (nonzero) digits is 194400, while the sum is 37.

The spelling of 55440333631 in words is "fifty-five billion, four hundred forty million, three hundred thirty-three thousand, six hundred thirty-one".