55045045990 has 16 divisors (see below), whose sum is σ = 108088454160. Its totient is φ = 20016380320.

The previous prime is 55045045981. The next prime is 55045046027. The reversal of 55045045990 is 9954054055.

It is a self number, because there is not a number n which added to its sum of digits gives 55045045990.

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, 250204645 + ... + 250204864.

It is an arithmetic number, because the mean of its divisors is an integer number (6755528385).

Almost surely, 2^55045045990 is an apocalyptic number.

55045045990 is a deficient number, since it is larger than the sum of its proper divisors (53043408170).

55045045990 is a wasteful number, since it uses less digits than its factorization.

55045045990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500409527.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 55045045990 in words is "fifty-five billion, forty-five million, forty-five thousand, nine hundred ninety".