808754640656 has 80 divisors (see below), whose sum is σ = 1629509038080. Its totient is φ = 388435927680.

The previous prime is 808754640637. The next prime is 808754640689. The reversal of 808754640656 is 656046457808.

It is a happy number.

It is a super-2 number, since 2×808754640656² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 808754640595 and 808754640604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67825511 + ... + 67837433.

It is an arithmetic number, because the mean of its divisors is an integer number (20368862976).

Almost surely, 2^808754640656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 808754640656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814754519040).

808754640656 is an abundant number, since it is smaller than the sum of its proper divisors (820754397424).

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

808754640656 is a wasteful number, since it uses less digits than its factorization.

808754640656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964 (or 12958 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 59.

The spelling of 808754640656 in words is "eight hundred eight billion, seven hundred fifty-four million, six hundred forty thousand, six hundred fifty-six".