55561478 has 16 divisors (see below), whose sum is σ = 97572384. Its totient is φ = 23231040.

The previous prime is 55561469. The next prime is 55561481. The reversal of 55561478 is 87416555.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent 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, 47825 + ... + 48972.

It is an arithmetic number, because the mean of its divisors is an integer number (6098274).

Almost surely, 2^55561478 is an apocalyptic number.

55561478 is a deficient number, since it is larger than the sum of its proper divisors (42010906).

55561478 is a wasteful number, since it uses less digits than its factorization.

55561478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96847.

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

The square root of 55561478 is about 7453.9572040628. The cubic root of 55561478 is about 381.5849727157.

The spelling of 55561478 in words is "fifty-five million, five hundred sixty-one thousand, four hundred seventy-eight".