791980556 has 24 divisors (see below), whose sum is σ = 1402238880. Its totient is φ = 391352832.

The previous prime is 791980549. The next prime is 791980561. The reversal of 791980556 is 655089197.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473690 + ... + 475358.

It is an arithmetic number, because the mean of its divisors is an integer number (58426620).

Almost surely, 2^791980556 is an apocalyptic number.

It is an amenable number.

791980556 is a deficient number, since it is larger than the sum of its proper divisors (610258324).

791980556 is a wasteful number, since it uses less digits than its factorization.

791980556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2993 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 791980556 is about 28142.1491005929. The cubic root of 791980556 is about 925.2054302924.

The spelling of 791980556 in words is "seven hundred ninety-one million, nine hundred eighty thousand, five hundred fifty-six".