817374526464 has 88 divisors (see below), whose sum is σ = 2186356452048. Its totient is φ = 271488286720.

The previous prime is 817374526391. The next prime is 817374526477. The reversal of 817374526464 is 464625473718.

It is a super-2 number, since 2×817374526464² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389794 + ... + 1336670.

Almost surely, 2^817374526464 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 817374526464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093178226024).

817374526464 is an abundant number, since it is smaller than the sum of its proper divisors (1368981925584).

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

817374526464 is a wasteful number, since it uses less digits than its factorization.

817374526464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947181 (or 947163 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 57.

The spelling of 817374526464 in words is "eight hundred seventeen billion, three hundred seventy-four million, five hundred twenty-six thousand, four hundred sixty-four".