55505272725 has 72 divisors (see below), whose sum is σ = 113796109440. Its totient is φ = 25334156160.

The previous prime is 55505272681. The next prime is 55505272727. The reversal of 55505272725 is 52727250555.

55505272725 is a `hidden beast` number, since 5 + 5 + 50 + 527 + 2 + 72 + 5 = 666.

It is not a de Polignac number, because 55505272725 - 2⁸ = 55505272469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505272727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 991791 + ... + 1046259.

It is an arithmetic number, because the mean of its divisors is an integer number (1580501520).

Almost surely, 2^55505272725 is an apocalyptic number.

It is an amenable number.

55505272725 is an abundant number, since it is smaller than the sum of its proper divisors (58290836715).

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

55505272725 is a wasteful number, since it uses less digits than its factorization.

55505272725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55139 (or 55131 counting only the distinct ones).

The product of its (nonzero) digits is 1225000, while the sum is 45.

The spelling of 55505272725 in words is "fifty-five billion, five hundred five million, two hundred seventy-two thousand, seven hundred twenty-five".