55186464 has 24 divisors (see below), whose sum is σ = 144864720. Its totient is φ = 18395456.

The previous prime is 55186463. The next prime is 55186487. The reversal of 55186464 is 46468155.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (55186463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287334 + ... + 287525.

It is an arithmetic number, because the mean of its divisors is an integer number (6036030).

Almost surely, 2^55186464 is an apocalyptic number.

It is an amenable number.

55186464 is an abundant number, since it is smaller than the sum of its proper divisors (89678256).

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

55186464 is a wasteful number, since it uses less digits than its factorization.

55186464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574872 (or 574864 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 55186464 is about 7428.7592503728. The cubic root of 55186464 is about 380.7245272124.

The spelling of 55186464 in words is "fifty-five million, one hundred eighty-six thousand, four hundred sixty-four".