55610878 has 4 divisors (see below), whose sum is σ = 83416320. Its totient is φ = 27805438.

The previous prime is 55610861. The next prime is 55610879. The reversal of 55610878 is 87801655.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 55610878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55610879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13902718 + ... + 13902721.

It is an arithmetic number, because the mean of its divisors is an integer number (20854080).

Almost surely, 2^55610878 is an apocalyptic number.

55610878 is a deficient number, since it is larger than the sum of its proper divisors (27805442).

55610878 is a wasteful number, since it uses less digits than its factorization.

55610878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27805441.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 55610878 is about 7457.2701439602. The cubic root of 55610878 is about 381.6980289461.

The spelling of 55610878 in words is "fifty-five million, six hundred ten thousand, eight hundred seventy-eight".