55578164 has 24 divisors (see below), whose sum is σ = 100708608. Its totient is φ = 26809920.

The previous prime is 55578163. The next prime is 55578167. The reversal of 55578164 is 46187555.

It is a super-2 number, since 2×55578164² = 6177864627221792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55578163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64424 + ... + 65280.

It is an arithmetic number, because the mean of its divisors is an integer number (4196192).

Almost surely, 2^55578164 is an apocalyptic number.

It is an amenable number.

55578164 is a deficient number, since it is larger than the sum of its proper divisors (45130444).

55578164 is a wasteful number, since it uses less digits than its factorization.

55578164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1413 counting only the distinct ones).

The product of its digits is 168000, while the sum is 41.

The square root of 55578164 is about 7455.0763912920. The cubic root of 55578164 is about 381.6231675814.

The spelling of 55578164 in words is "fifty-five million, five hundred seventy-eight thousand, one hundred sixty-four".