816790208648 has 16 divisors (see below), whose sum is σ = 1533333505680. Its totient is φ = 407901273808.

The previous prime is 816790208639. The next prime is 816790208651. The reversal of 816790208648 is 846802097618.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61721786 + ... + 61735017.

It is an arithmetic number, because the mean of its divisors is an integer number (95833344105).

Almost surely, 2^816790208648 is an apocalyptic number.

It is an amenable number.

816790208648 is a deficient number, since it is larger than the sum of its proper divisors (716543297032).

816790208648 is a wasteful number, since it uses less digits than its factorization.

816790208648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123457636 (or 123457632 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 816790208648 in words is "eight hundred sixteen billion, seven hundred ninety million, two hundred eight thousand, six hundred forty-eight".