55551225726 has 24 divisors (see below), whose sum is σ = 120753056424. Its totient is φ = 18456757200.

The previous prime is 55551225721. The next prime is 55551225781. The reversal of 55551225726 is 62752215555.

55551225726 is a `hidden beast` number, since 5 + 5 + 5 + 51 + 22 + 572 + 6 = 666.

It is a super-2 number, since 2×55551225726² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55551225721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5020825 + ... + 5031876.

It is an arithmetic number, because the mean of its divisors is an integer number (5031377351).

Almost surely, 2^55551225726 is an apocalyptic number.

55551225726 is an abundant number, since it is smaller than the sum of its proper divisors (65201830698).

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

55551225726 is a wasteful number, since it uses less digits than its factorization.

55551225726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10053016 (or 10053013 counting only the distinct ones).

The product of its digits is 1050000, while the sum is 45.

The spelling of 55551225726 in words is "fifty-five billion, five hundred fifty-one million, two hundred twenty-five thousand, seven hundred twenty-six".