55726128129 has 48 divisors (see below), whose sum is σ = 91609455168. Its totient is φ = 29939954688.

The previous prime is 55726128079. The next prime is 55726128169. The reversal of 55726128129 is 92182162755.

It is not a de Polignac number, because 55726128129 - 2¹² = 55726124033 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55726128169) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2570674 + ... + 2592260.

It is an arithmetic number, because the mean of its divisors is an integer number (1908530316).

Almost surely, 2^55726128129 is an apocalyptic number.

It is an amenable number.

55726128129 is a deficient number, since it is larger than the sum of its proper divisors (35883327039).

55726128129 is a wasteful number, since it uses less digits than its factorization.

55726128129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22654 (or 22647 counting only the distinct ones).

The product of its digits is 604800, while the sum is 48.

The spelling of 55726128129 in words is "fifty-five billion, seven hundred twenty-six million, one hundred twenty-eight thousand, one hundred twenty-nine".