55488631891 has 32 divisors (see below), whose sum is σ = 70629580800. Its totient is φ = 43215177600.

The previous prime is 55488631879. The next prime is 55488631931. The reversal of 55488631891 is 19813688455.

It is a happy number.

55488631891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55488631891 - 2⁵ = 55488631859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55488631811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12792075 + ... + 12796411.

It is an arithmetic number, because the mean of its divisors is an integer number (2207174400).

Almost surely, 2^55488631891 is an apocalyptic number.

55488631891 is a deficient number, since it is larger than the sum of its proper divisors (15140948909).

55488631891 is a wasteful number, since it uses less digits than its factorization.

55488631891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7760 (or 7746 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 58.

The spelling of 55488631891 in words is "fifty-five billion, four hundred eighty-eight million, six hundred thirty-one thousand, eight hundred ninety-one".