189951057522 has 54 divisors (see below), whose sum is σ = 421530833997. Its totient is φ = 61818643152.

The previous prime is 189951057511. The next prime is 189951057529. The reversal of 189951057522 is 225750159981.

189951057522 is a `hidden beast` number, since 1 + 8 + 9 + 9 + 5 + 105 + 7 + 522 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 174582744561 + 15368312961 = 417831^2 + 123969^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=308181.

It is not an unprimeable number, because it can be changed into a prime (189951057529) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 79509504 + ... + 79511892.

Almost surely, 2^189951057522 is an apocalyptic number.

189951057522 is an abundant number, since it is smaller than the sum of its proper divisors (231579776475).

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

189951057522 is an frugal number, since it uses more digits than its factorization.

189951057522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4872 (or 2437 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 54.

The spelling of 189951057522 in words is "one hundred eighty-nine billion, nine hundred fifty-one million, fifty-seven thousand, five hundred twenty-two".