55156669018 has 32 divisors (see below), whose sum is σ = 90829065600. Its totient is φ = 24912360000.

The previous prime is 55156668977. The next prime is 55156669027. The reversal of 55156669018 is 81096665155.

It is a super-2 number, since 2×55156669018² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5565868 + ... + 5575768.

It is an arithmetic number, because the mean of its divisors is an integer number (2838408300).

Almost surely, 2^55156669018 is an apocalyptic number.

55156669018 is a deficient number, since it is larger than the sum of its proper divisors (35672396582).

55156669018 is a wasteful number, since it uses less digits than its factorization.

55156669018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11494.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 55156669018 in words is "fifty-five billion, one hundred fifty-six million, six hundred sixty-nine thousand, eighteen".