791208561 has 32 divisors (see below), whose sum is σ = 1257919488. Its totient is φ = 436011840.

The previous prime is 791208559. The next prime is 791208563. The reversal of 791208561 is 165802197.

791208561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (791208559) and next prime (791208563).

It is not a de Polignac number, because 791208561 - 2¹ = 791208559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (791208563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14980 + ... + 42506.

It is an arithmetic number, because the mean of its divisors is an integer number (39309984).

Almost surely, 2^791208561 is an apocalyptic number.

It is an amenable number.

791208561 is a deficient number, since it is larger than the sum of its proper divisors (466710927).

791208561 is a wasteful number, since it uses less digits than its factorization.

791208561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27621.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 791208561 is about 28128.4297642083. The cubic root of 791208561 is about 924.9047132428.

The spelling of 791208561 in words is "seven hundred ninety-one million, two hundred eight thousand, five hundred sixty-one".