55015561666604 has 96 divisors (see below), whose sum is σ = 120107957760000. Its totient is φ = 21421424001600.

The previous prime is 55015561666601. The next prime is 55015561666633. The reversal of 55015561666604 is 40666616551055.

It is a self number, because there is not a number n which added to its sum of digits gives 55015561666604.

It is not an unprimeable number, because it can be changed into a prime (55015561666601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4636006679 + ... + 4636018545.

It is an arithmetic number, because the mean of its divisors is an integer number (1251124560000).

Almost surely, 2^{55015561666604} is an apocalyptic number.

It is an amenable number.

55015561666604 is an abundant number, since it is smaller than the sum of its proper divisors (65092396093396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55015561666604 is a wasteful number, since it uses less digits than its factorization.

55015561666604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19899 (or 19897 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 56.

The spelling of 55015561666604 in words is "fifty-five trillion, fifteen billion, five hundred sixty-one million, six hundred sixty-six thousand, six hundred four".