791646855078816 has 120 divisors (see below), whose sum is σ = 2539866993469344. Its totient is φ = 239892986378880.

The previous prime is 791646855078787. The next prime is 791646855078841. The reversal of 791646855078816 is 618870558646197.

791646855078816 is a `hidden beast` number, since 7 + 9 + 1 + 6 + 46 + 8 + 550 + 7 + 8 + 8 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13882667460 + ... + 13882724483.

Almost surely, 2^{791646855078816} is an apocalyptic number.

It is an amenable number.

791646855078816 is an abundant number, since it is smaller than the sum of its proper divisors (1748220138390528).

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

791646855078816 is a wasteful number, since it uses less digits than its factorization.

791646855078816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27765391976 (or 27765391959 counting only the distinct ones).

The product of its (nonzero) digits is 4877107200, while the sum is 81.

The spelling of 791646855078816 in words is "seven hundred ninety-one trillion, six hundred forty-six billion, eight hundred fifty-five million, seventy-eight thousand, eight hundred sixteen".