817864714772 has 36 divisors (see below), whose sum is σ = 1681103380320. Its totient is φ = 347110397424.

The previous prime is 817864714769. The next prime is 817864714783. The reversal of 817864714772 is 277417468718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20236022 + ... + 20276397.

It is an arithmetic number, because the mean of its divisors is an integer number (46697316120).

Almost surely, 2^817864714772 is an apocalyptic number.

It is an amenable number.

817864714772 is an abundant number, since it is smaller than the sum of its proper divisors (863238665548).

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

817864714772 is a wasteful number, since it uses less digits than its factorization.

817864714772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40512540 (or 40512531 counting only the distinct ones).

The product of its digits is 29503488, while the sum is 62.

The spelling of 817864714772 in words is "eight hundred seventeen billion, eight hundred sixty-four million, seven hundred fourteen thousand, seven hundred seventy-two".