55165002081 has 12 divisors (see below), whose sum is σ = 85562044272. Its totient is φ = 31522858248.

The previous prime is 55165002071. The next prime is 55165002127. The reversal of 55165002081 is 18020056155.

It is not a de Polignac number, because 55165002081 - 2⁵ = 55165002049 is a prime.

It is a super-2 number, since 2×55165002081² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55165002001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187635915 + ... + 187636208.

It is an arithmetic number, because the mean of its divisors is an integer number (7130170356).

Almost surely, 2^55165002081 is an apocalyptic number.

It is an amenable number.

55165002081 is a deficient number, since it is larger than the sum of its proper divisors (30397042191).

55165002081 is a wasteful number, since it uses less digits than its factorization.

55165002081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375272140 (or 375272133 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 55165002081 in words is "fifty-five billion, one hundred sixty-five million, two thousand, eighty-one".