55111623615 has 64 divisors (see below), whose sum is σ = 101058295680. Its totient is φ = 28837980288.

The previous prime is 55111623599. The next prime is 55111623629. The reversal of 55111623615 is 51632611155.

55111623615 is a `hidden beast` number, since 5 + 5 + 1 + 1 + 16 + 23 + 615 = 666.

It is not a de Polignac number, because 55111623615 - 2⁴ = 55111623599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55111623615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 532009 + ... + 627101.

It is an arithmetic number, because the mean of its divisors is an integer number (1579035870).

Almost surely, 2^55111623615 is an apocalyptic number.

55111623615 is a deficient number, since it is larger than the sum of its proper divisors (45946672065).

55111623615 is an frugal number, since it uses more digits than its factorization.

55111623615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95172 (or 95154 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The spelling of 55111623615 in words is "fifty-five billion, one hundred eleven million, six hundred twenty-three thousand, six hundred fifteen".