55172597776 has 40 divisors (see below), whose sum is σ = 115040487384. Its totient is φ = 25537935360.

The previous prime is 55172597771. The next prime is 55172597791. The reversal of 55172597776 is 67779527155.

It can be written as a sum of positive squares in 4 ways, for example, as 545689600 + 54626908176 = 23360^2 + 233724^2 .

It is a Harshad number since it is a multiple of its sum of digits (61).

It is not an unprimeable number, because it can be changed into a prime (55172597771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646035 + ... + 1679218.

Almost surely, 2^55172597776 is an apocalyptic number.

It is an amenable number.

55172597776 is an abundant number, since it is smaller than the sum of its proper divisors (59867889608).

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

55172597776 is a wasteful number, since it uses less digits than its factorization.

55172597776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325339 (or 3325333 counting only the distinct ones).

The product of its digits is 32413500, while the sum is 61.

The spelling of 55172597776 in words is "fifty-five billion, one hundred seventy-two million, five hundred ninety-seven thousand, seven hundred seventy-six".