55961169 has 24 divisors (see below), whose sum is σ = 84677376. Its totient is φ = 32815200.

The previous prime is 55961167. The next prime is 55961183. The reversal of 55961169 is 96116955.

It is not a de Polignac number, because 55961169 - 2¹ = 55961167 is a prime.

It is a super-2 number, since 2×55961169² = 6263304871693122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55961169.

It is not an unprimeable number, because it can be changed into a prime (55961167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8767 + ... + 13739.

It is an arithmetic number, because the mean of its divisors is an integer number (3528224).

Almost surely, 2^55961169 is an apocalyptic number.

It is an amenable number.

55961169 is a deficient number, since it is larger than the sum of its proper divisors (28716207).

55961169 is a wasteful number, since it uses less digits than its factorization.

55961169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029 (or 5018 counting only the distinct ones).

The product of its digits is 72900, while the sum is 42.

The square root of 55961169 is about 7480.7198183063. The cubic root of 55961169 is about 382.4977863087.

The spelling of 55961169 in words is "fifty-five million, nine hundred sixty-one thousand, one hundred sixty-nine".