861318604659 has 32 divisors (see below), whose sum is σ = 1193248834560. Its totient is φ = 552168790272.

The previous prime is 861318604651. The next prime is 861318604669. The reversal of 861318604659 is 956406813168.

It is not a de Polignac number, because 861318604659 - 2³ = 861318604651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861318604599 and 861318604608.

It is not an unprimeable number, because it can be changed into a prime (861318604651) 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, 23523364 + ... + 23559950.

It is an arithmetic number, because the mean of its divisors is an integer number (37289026080).

Almost surely, 2^861318604659 is an apocalyptic number.

861318604659 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

861318604659 is a deficient number, since it is larger than the sum of its proper divisors (331930229901).

861318604659 is a wasteful number, since it uses less digits than its factorization.

861318604659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39099.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 861318604659 in words is "eight hundred sixty-one billion, three hundred eighteen million, six hundred four thousand, six hundred fifty-nine".