812995251633 has 24 divisors (see below), whose sum is σ = 1176827130336. Its totient is φ = 540843912000.

The previous prime is 812995251619. The next prime is 812995251641. The reversal of 812995251633 is 336152599218.

812995251633 is a `hidden beast` number, since 8 + 1 + 2 + 9 + 95 + 2 + 516 + 33 = 666.

812995251633 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 812995251633 - 2⁹ = 812995251121 is a prime.

It is a super-2 number, since 2×812995251633² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 812995251633.

It is not an unprimeable number, because it can be changed into a prime (812995252633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8056218 + ... + 8156508.

It is an arithmetic number, because the mean of its divisors is an integer number (49034463764).

Almost surely, 2^812995251633 is an apocalyptic number.

It is an amenable number.

812995251633 is a deficient number, since it is larger than the sum of its proper divisors (363831878703).

812995251633 is a wasteful number, since it uses less digits than its factorization.

812995251633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102205 (or 102202 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The spelling of 812995251633 in words is "eight hundred twelve billion, nine hundred ninety-five million, two hundred fifty-one thousand, six hundred thirty-three".