55191513888 has 96 divisors (see below), whose sum is σ = 183971733120. Its totient is φ = 15769002240.

The previous prime is 55191513877. The next prime is 55191513919. The reversal of 55191513888 is 88831519155.

55191513888 is a `hidden beast` number, since 5 + 519 + 15 + 1 + 38 + 88 = 666.

55191513888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×55191513888² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4556743 + ... + 4568838.

It is an arithmetic number, because the mean of its divisors is an integer number (1916372220).

Almost surely, 2^55191513888 is an apocalyptic number.

It is an amenable number.

55191513888 is an abundant number, since it is smaller than the sum of its proper divisors (128780219232).

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

55191513888 is a wasteful number, since it uses less digits than its factorization.

55191513888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9125607 (or 9125593 counting only the distinct ones).

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

The spelling of 55191513888 in words is "fifty-five billion, one hundred ninety-one million, five hundred thirteen thousand, eight hundred eighty-eight".