861325659 has 12 divisors (see below), whose sum is σ = 1244441952. Its totient is φ = 574076400.

The previous prime is 861325649. The next prime is 861325679. The reversal of 861325659 is 956523168.

861325659 is a `hidden beast` number, since 8 + 613 + 25 + 6 + 5 + 9 = 666.

It is not a de Polignac number, because 861325659 - 2⁸ = 861325403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861325649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38254 + ... + 56444.

It is an arithmetic number, because the mean of its divisors is an integer number (103703496).

Almost surely, 2^861325659 is an apocalyptic number.

861325659 is a deficient number, since it is larger than the sum of its proper divisors (383116293).

861325659 is a wasteful number, since it uses less digits than its factorization.

861325659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23458 (or 23455 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 861325659 is about 29348.3501921318. The cubic root of 861325659 is about 951.4569183623.

The spelling of 861325659 in words is "eight hundred sixty-one million, three hundred twenty-five thousand, six hundred fifty-nine".