55403646164 has 48 divisors (see below), whose sum is σ = 99241476096. Its totient is φ = 27056700000.

The previous prime is 55403646139. The next prime is 55403646217. The reversal of 55403646164 is 46164630455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30390557 + ... + 30392379.

It is an arithmetic number, because the mean of its divisors is an integer number (2067530752).

Almost surely, 2^55403646164 is an apocalyptic number.

It is an amenable number.

55403646164 is a deficient number, since it is larger than the sum of its proper divisors (43837829932).

55403646164 is a wasteful number, since it uses less digits than its factorization.

55403646164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796 (or 2794 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 55403646164 in words is "fifty-five billion, four hundred three million, six hundred forty-six thousand, one hundred sixty-four".