812532017256 has 32 divisors (see below), whose sum is σ = 2031419587200. Its totient is φ = 270832066560.

The previous prime is 812532017177. The next prime is 812532017257. The reversal of 812532017256 is 652710235218.

It is a super-2 number, since 2×812532017256² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812532017257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181696 + ... + 1287663.

It is an arithmetic number, because the mean of its divisors is an integer number (63481862100).

Almost surely, 2^812532017256 is an apocalyptic number.

It is an amenable number.

812532017256 is an abundant number, since it is smaller than the sum of its proper divisors (1218887569944).

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

812532017256 is a wasteful number, since it uses less digits than its factorization.

812532017256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492409 (or 1492405 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 812532017256 in words is "eight hundred twelve billion, five hundred thirty-two million, seventeen thousand, two hundred fifty-six".