55398555522 has 54 divisors (see below), whose sum is σ = 124376916027. Its totient is φ = 17820100032.

The previous prime is 55398555491. The next prime is 55398555529. The reversal of 55398555522 is 22555589355.

55398555522 is a `hidden beast` number, since 5 + 5 + 3 + 9 + 85 + 5 + 552 + 2 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 49114981161 + 6283574361 = 221619^2 + 79269^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=166431.

It is not an unprimeable number, because it can be changed into a prime (55398555529) 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 26 ways as a sum of consecutive naturals, for example, 28958038 + ... + 28959950.

Almost surely, 2^55398555522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55398555522

55398555522 is an abundant number, since it is smaller than the sum of its proper divisors (68978360505).

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

55398555522 is an equidigital number, since it uses as much as digits as its factorization.

55398555522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892 (or 1947 counting only the distinct ones).

The product of its digits is 13500000, while the sum is 54.

The spelling of 55398555522 in words is "fifty-five billion, three hundred ninety-eight million, five hundred fifty-five thousand, five hundred twenty-two".