812656136718 has 32 divisors (see below), whose sum is σ = 1808877726720. Its totient is φ = 270439098840.

The previous prime is 812656136713. The next prime is 812656136731. The reversal of 812656136718 is 817631656218.

It is a happy number.

812656136718 is a `hidden beast` number, since 8 + 1 + 2 + 6 + 5 + 613 + 6 + 7 + 18 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812656136713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12363588 + ... + 12429143.

It is an arithmetic number, because the mean of its divisors is an integer number (56527428960).

Almost surely, 2^812656136718 is an apocalyptic number.

812656136718 is an abundant number, since it is smaller than the sum of its proper divisors (996221590002).

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

812656136718 is a wasteful number, since it uses less digits than its factorization.

812656136718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24793349 (or 24793343 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 812656136718 in words is "eight hundred twelve billion, six hundred fifty-six million, one hundred thirty-six thousand, seven hundred eighteen".