812665257632 has 48 divisors (see below), whose sum is σ = 1608243827904. Its totient is φ = 404224128000.

The previous prime is 812665257629. The next prime is 812665257667. The reversal of 812665257632 is 236752566218.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15577832 + ... + 15629912.

It is an arithmetic number, because the mean of its divisors is an integer number (33505079748).

Almost surely, 2^812665257632 is an apocalyptic number.

It is an amenable number.

812665257632 is a deficient number, since it is larger than the sum of its proper divisors (795578570272).

812665257632 is a wasteful number, since it uses less digits than its factorization.

812665257632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54613 (or 54605 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 53.

The spelling of 812665257632 in words is "eight hundred twelve billion, six hundred sixty-five million, two hundred fifty-seven thousand, six hundred thirty-two".