55165856155 has 16 divisors (see below), whose sum is σ = 69083725824. Its totient is φ = 42209912800.

The previous prime is 55165856153. The next prime is 55165856159.

55165856155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55165856155 - 2¹ = 55165856153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55165856153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1981542 + ... + 2009188.

It is an arithmetic number, because the mean of its divisors is an integer number (4317732864).

Almost surely, 2^55165856155 is an apocalyptic number.

55165856155 is a deficient number, since it is larger than the sum of its proper divisors (13917869669).

55165856155 is a wasteful number, since it uses less digits than its factorization.

55165856155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45026.

The product of its digits is 4500000, while the sum is 52.

The spelling of 55165856155 in words is "fifty-five billion, one hundred sixty-five million, eight hundred fifty-six thousand, one hundred fifty-five".