791981756 has 12 divisors (see below), whose sum is σ = 1412118792. Its totient is φ = 388519248.

The previous prime is 791981753. The next prime is 791981791. The reversal of 791981756 is 657189197.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a junction number, because it is equal to n+sod(n) for n = 791981698 and 791981707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791981753) 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, 1867670 + ... + 1868093.

It is an arithmetic number, because the mean of its divisors is an integer number (117676566).

Almost surely, 2^791981756 is an apocalyptic number.

It is an amenable number.

791981756 is a deficient number, since it is larger than the sum of its proper divisors (620137036).

791981756 is a wasteful number, since it uses less digits than its factorization.

791981756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3735820 (or 3735818 counting only the distinct ones).

The product of its digits is 952560, while the sum is 53.

The square root of 791981756 is about 28142.1704209181. The cubic root of 791981756 is about 925.2058975791.

The spelling of 791981756 in words is "seven hundred ninety-one million, nine hundred eighty-one thousand, seven hundred fifty-six".