55381181958 has 12 divisors (see below), whose sum is σ = 119992560948. Its totient is φ = 18460393980.

The previous prime is 55381181917. The next prime is 55381181981. The reversal of 55381181958 is 85918118355.

55381181958 is a `hidden beast` number, since 5 + 538 + 1 + 18 + 1 + 95 + 8 = 666.

55381181958 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1538366148 + ... + 1538366183.

It is an arithmetic number, because the mean of its divisors is an integer number (9999380079).

Almost surely, 2^55381181958 is an apocalyptic number.

55381181958 is an abundant number, since it is smaller than the sum of its proper divisors (64611378990).

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

55381181958 is a wasteful number, since it uses less digits than its factorization.

55381181958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076732339 (or 3076732336 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 54.

The spelling of 55381181958 in words is "fifty-five billion, three hundred eighty-one million, one hundred eighty-one thousand, nine hundred fifty-eight".