791934561 has 12 divisors (see below), whose sum is σ = 1247897040. Its totient is φ = 479960280.

The previous prime is 791934547. The next prime is 791934571. The reversal of 791934561 is 165439197.

791934561 is a `hidden beast` number, since 7 + 9 + 193 + 456 + 1 = 666.

It is not a de Polignac number, because 791934561 - 2⁵ = 791934529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (791934571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3999571 + ... + 3999768.

It is an arithmetic number, because the mean of its divisors is an integer number (103991420).

Almost surely, 2^791934561 is an apocalyptic number.

It is an amenable number.

791934561 is a deficient number, since it is larger than the sum of its proper divisors (455962479).

791934561 is a wasteful number, since it uses less digits than its factorization.

791934561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999356 (or 7999353 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 791934561 is about 28141.3318981174. The cubic root of 791934561 is about 925.1875192266.

The spelling of 791934561 in words is "seven hundred ninety-one million, nine hundred thirty-four thousand, five hundred sixty-one".