791381366980 has 24 divisors (see below), whose sum is σ = 1665602227800. Its totient is φ = 315847526400.

The previous prime is 791381366969. The next prime is 791381367017. The reversal of 791381366980 is 89663183197.

It can be written as a sum of positive squares in 4 ways, for example, as 12864550084 + 778516816896 = 113422^2 + 882336^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44054571 + ... + 44072530.

It is an arithmetic number, because the mean of its divisors is an integer number (69400092825).

Almost surely, 2^791381366980 is an apocalyptic number.

It is an amenable number.

791381366980 is an abundant number, since it is smaller than the sum of its proper divisors (874220860820).

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

791381366980 is a wasteful number, since it uses less digits than its factorization.

791381366980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88127559 (or 88127557 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 791381366980 in words is "seven hundred ninety-one billion, three hundred eighty-one million, three hundred sixty-six thousand, nine hundred eighty".