861418899 has 24 divisors (see below), whose sum is σ = 1365541632. Its totient is φ = 518935920.

The previous prime is 861418847. The next prime is 861418963. The reversal of 861418899 is 998814168.

861418899 is a `hidden beast` number, since 8 + 614 + 18 + 8 + 9 + 9 = 666.

861418899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861418899 - 2⁹ = 861418387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861418819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9519 + ... + 42584.

It is an arithmetic number, because the mean of its divisors is an integer number (56897568).

Almost surely, 2^861418899 is an apocalyptic number.

861418899 is a deficient number, since it is larger than the sum of its proper divisors (504122733).

861418899 is a wasteful number, since it uses less digits than its factorization.

861418899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52287 (or 52284 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 861418899 is about 29349.9386541097. The cubic root of 861418899 is about 951.4912494120.

The spelling of 861418899 in words is "eight hundred sixty-one million, four hundred eighteen thousand, eight hundred ninety-nine".