55778475 has 24 divisors (see below), whose sum is σ = 92619072. Its totient is φ = 29620000.

The previous prime is 55778467. The next prime is 55778521. The reversal of 55778475 is 57487755.

It is a happy number.

It is not a de Polignac number, because 55778475 - 2³ = 55778467 is a prime.

It is a super-2 number, since 2×55778475² = 6222476546651250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17344 + ... + 20306.

It is an arithmetic number, because the mean of its divisors is an integer number (3859128).

Almost surely, 2^55778475 is an apocalyptic number.

55778475 is a deficient number, since it is larger than the sum of its proper divisors (36840597).

55778475 is a wasteful number, since it uses less digits than its factorization.

55778475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227 (or 3222 counting only the distinct ones).

The product of its digits is 1372000, while the sum is 48.

The square root of 55778475 is about 7468.4988451495. The cubic root of 55778475 is about 382.0810912156.

The spelling of 55778475 in words is "fifty-five million, seven hundred seventy-eight thousand, four hundred seventy-five".