55111398187 has 8 divisors (see below), whose sum is σ = 55189892160. Its totient is φ = 55032949440.

The previous prime is 55111398179. The next prime is 55111398191. The reversal of 55111398187 is 78189311155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55111398187 - 2³ = 55111398179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55111398187.

It is not an unprimeable number, because it can be changed into a prime (55111398787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2963137 + ... + 2981677.

It is an arithmetic number, because the mean of its divisors is an integer number (6898736520).

Almost surely, 2^55111398187 is an apocalyptic number.

55111398187 is a deficient number, since it is larger than the sum of its proper divisors (78493973).

55111398187 is a wasteful number, since it uses less digits than its factorization.

55111398187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22613.

The product of its digits is 302400, while the sum is 49.

The spelling of 55111398187 in words is "fifty-five billion, one hundred eleven million, three hundred ninety-eight thousand, one hundred eighty-seven".