55988551161 has 45 divisors (see below), whose sum is σ = 85228542399. Its totient is φ = 36628621200.

The previous prime is 55988551141. The next prime is 55988551193. The reversal of 55988551161 is 16115588955.

The square root of 55988551161 is 236619.

It is a perfect power (a square), and thus also a powerful number.

55988551161 is a `hidden beast` number, since 5 + 5 + 9 + 88 + 551 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1820643561 + 54167907600 = 42669^2 + 232740^2 .

It is not a de Polignac number, because 55988551161 - 2²⁷ = 55854333433 is a prime.

It is a super-2 number, since 2×55988551161² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55988551098 and 55988551107.

It is not an unprimeable number, because it can be changed into a prime (55988551141) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 129903616 + ... + 129904046.

Almost surely, 2^55988551161 is an apocalyptic number.

55988551161 is the 236619-th square number.

55988551161 is the 118310-th centered octagonal number.

It is an amenable number.

55988551161 is a deficient number, since it is larger than the sum of its proper divisors (29239991238).

55988551161 is an frugal number, since it uses more digits than its factorization.

55988551161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 495 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 54.

The spelling of 55988551161 in words is "fifty-five billion, nine hundred eighty-eight million, five hundred fifty-one thousand, one hundred sixty-one".