55511665155 has 24 divisors (see below), whose sum is σ = 96241174848. Its totient is φ = 29599773696.

The previous prime is 55511665141. The next prime is 55511665201. The reversal of 55511665155 is 55156611555.

It is not a de Polignac number, because 55511665155 - 2⁵ = 55511665123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55511665155.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78294 + ... + 342276.

It is an arithmetic number, because the mean of its divisors is an integer number (4010048952).

Almost surely, 2^55511665155 is an apocalyptic number.

55511665155 is a deficient number, since it is larger than the sum of its proper divisors (40729509693).

55511665155 is a wasteful number, since it uses less digits than its factorization.

55511665155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268667 (or 268664 counting only the distinct ones).

The product of its digits is 562500, while the sum is 45.

The spelling of 55511665155 in words is "fifty-five billion, five hundred eleven million, six hundred sixty-five thousand, one hundred fifty-five".