55991295522 has 42 divisors (see below), whose sum is σ = 125943133953. Its totient is φ = 18660753432.

The previous prime is 55991295457. The next prime is 55991295527. The reversal of 55991295522 is 22559219955.

It is a happy number.

55991295522 is a `hidden beast` number, since 5 + 5 + 9 + 91 + 29 + 5 + 522 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55343033001 + 648262521 = 235251^2 + 25461^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=167319.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (55991295527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 9032128 + ... + 9038324.

Almost surely, 2^55991295522 is an apocalyptic number.

55991295522 is an abundant number, since it is smaller than the sum of its proper divisors (69951838431).

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

55991295522 is an frugal number, since it uses more digits than its factorization.

55991295522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12414 (or 6202 counting only the distinct ones).

The product of its digits is 3645000, while the sum is 54.

The spelling of 55991295522 in words is "fifty-five billion, nine hundred ninety-one million, two hundred ninety-five thousand, five hundred twenty-two".