55177164 has 72 divisors (see below), whose sum is σ = 160113408. Its totient is φ = 15694560.

The previous prime is 55177163. The next prime is 55177183. The reversal of 55177164 is 46177155.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55177163) 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, 87129 + ... + 87759.

Almost surely, 2^55177164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55177164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80056704).

55177164 is an abundant number, since it is smaller than the sum of its proper divisors (104936244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55177164 is a wasteful number, since it uses less digits than its factorization.

55177164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 990 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 55177164 is about 7428.1332782874. The cubic root of 55177164 is about 380.7031394979.

Subtracting from 55177164 its reverse (46177155), we obtain a palindrome (9000009).

The spelling of 55177164 in words is "fifty-five million, one hundred seventy-seven thousand, one hundred sixty-four".