55423666764 has 36 divisors (see below), whose sum is σ = 148339815624. Its totient is φ = 17387816832.

The previous prime is 55423666741. The next prime is 55423666777. The reversal of 55423666764 is 46766632455.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55423666764.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45280162 + ... + 45281385.

It is an arithmetic number, because the mean of its divisors is an integer number (4120550434).

Almost surely, 2^55423666764 is an apocalyptic number.

It is an amenable number.

55423666764 is an abundant number, since it is smaller than the sum of its proper divisors (92916148860).

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

55423666764 is a wasteful number, since it uses less digits than its factorization.

55423666764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90561574 (or 90561569 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 54.

The spelling of 55423666764 in words is "fifty-five billion, four hundred twenty-three million, six hundred sixty-six thousand, seven hundred sixty-four".