812165363652 has 24 divisors (see below), whose sum is σ = 2006526193056. Its totient is φ = 254796976768.

The previous prime is 812165363651. The next prime is 812165363657. The reversal of 812165363652 is 256363561218.

It is a super-2 number, since 2×812165363652² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812165363651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1990601178 + ... + 1990601585.

It is an arithmetic number, because the mean of its divisors is an integer number (83605258044).

Almost surely, 2^812165363652 is an apocalyptic number.

It is an amenable number.

812165363652 is an abundant number, since it is smaller than the sum of its proper divisors (1194360829404).

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

812165363652 is a wasteful number, since it uses less digits than its factorization.

812165363652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981202787 (or 3981202785 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

The spelling of 812165363652 in words is "eight hundred twelve billion, one hundred sixty-five million, three hundred sixty-three thousand, six hundred fifty-two".