55128364664 has 64 divisors (see below), whose sum is σ = 107386905600. Its totient is φ = 26531441760.

The previous prime is 55128364651. The next prime is 55128364667. The reversal of 55128364664 is 46646382155.

55128364664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55128364667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54099947 + ... + 54100965.

It is an arithmetic number, because the mean of its divisors is an integer number (1677920400).

Almost surely, 2^55128364664 is an apocalyptic number.

It is an amenable number.

55128364664 is a deficient number, since it is larger than the sum of its proper divisors (52258540936).

55128364664 is a wasteful number, since it uses less digits than its factorization.

55128364664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1279 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 50.

The spelling of 55128364664 in words is "fifty-five billion, one hundred twenty-eight million, three hundred sixty-four thousand, six hundred sixty-four".