55811378 has 16 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 23706816.

The previous prime is 55811359. The next prime is 55811389. The reversal of 55811378 is 87311855.

It is a super-2 number, since 2×55811378² = 6229819828517768, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16058 + ... + 19221.

It is an arithmetic number, because the mean of its divisors is an integer number (6032880).

Almost surely, 2^55811378 is an apocalyptic number.

55811378 is a deficient number, since it is larger than the sum of its proper divisors (40714702).

55811378 is a wasteful number, since it uses less digits than its factorization.

55811378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35401.

The product of its digits is 33600, while the sum is 38.

The square root of 55811378 is about 7470.7013057678. The cubic root of 55811378 is about 382.1562046771.

The spelling of 55811378 in words is "fifty-five million, eight hundred eleven thousand, three hundred seventy-eight".