55621182165 has 16 divisors (see below), whose sum is σ = 94228826688. Its totient is φ = 27919652096.

The previous prime is 55621182137. The next prime is 55621182191. The reversal of 55621182165 is 56128112655.

It is a cyclic number.

It is not a de Polignac number, because 55621182165 - 2⁷ = 55621182037 is a prime.

It is a super-2 number, since 2×55621182165² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109060887 + ... + 109061396.

It is an arithmetic number, because the mean of its divisors is an integer number (5889301668).

Almost surely, 2^55621182165 is an apocalyptic number.

It is an amenable number.

55621182165 is a deficient number, since it is larger than the sum of its proper divisors (38607644523).

55621182165 is a wasteful number, since it uses less digits than its factorization.

55621182165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218122308.

The product of its digits is 144000, while the sum is 42.

The spelling of 55621182165 in words is "fifty-five billion, six hundred twenty-one million, one hundred eighty-two thousand, one hundred sixty-five".