812988459522 has 30 divisors (see below), whose sum is σ = 1821722078649. Its totient is φ = 270992327760.

The previous prime is 812988459499. The next prime is 812988459527. The reversal of 812988459522 is 225954889218.

812988459522 is a `hidden beast` number, since 8 + 1 + 29 + 8 + 84 + 5 + 9 + 522 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 812740113441 + 248346081 = 901521^2 + 15759^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=637569.

It is a self number, because there is not a number n which added to its sum of digits gives 812988459522.

It is not an unprimeable number, because it can be changed into a prime (812988459527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 11440822 + ... + 11511662.

Almost surely, 2^812988459522 is an apocalyptic number.

812988459522 is an abundant number, since it is smaller than the sum of its proper divisors (1008733619127).

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

812988459522 is an frugal number, since it uses more digits than its factorization.

812988459522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141696 (or 70846 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 63.

The spelling of 812988459522 in words is "eight hundred twelve billion, nine hundred eighty-eight million, four hundred fifty-nine thousand, five hundred twenty-two".