817909302642 has 8 divisors (see below), whose sum is σ = 1635818605296. Its totient is φ = 272636434212.

The previous prime is 817909302641. The next prime is 817909302649. The reversal of 817909302642 is 246203909718.

It is a sphenic number, since it is the product of 3 distinct primes.

817909302642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (817909302641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68159108548 + ... + 68159108559.

It is an arithmetic number, because the mean of its divisors is an integer number (204477325662).

Almost surely, 2^817909302642 is an apocalyptic number.

817909302642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

817909302642 is a wasteful number, since it uses less digits than its factorization.

817909302642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136318217112.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 817909302642 in words is "eight hundred seventeen billion, nine hundred nine million, three hundred two thousand, six hundred forty-two".