861168685 has 16 divisors (see below), whose sum is σ = 1148797440. Its totient is φ = 615424320.

The previous prime is 861168653. The next prime is 861168703. The reversal of 861168685 is 586861168.

It is not a de Polignac number, because 861168685 - 2⁵ = 861168653 is a prime.

It is a super-2 number, since 2×861168685² = 1483223008049258450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211675 + ... + 215704.

It is an arithmetic number, because the mean of its divisors is an integer number (71799840).

Almost surely, 2^861168685 is an apocalyptic number.

It is an amenable number.

861168685 is a deficient number, since it is larger than the sum of its proper divisors (287628755).

861168685 is a wasteful number, since it uses less digits than its factorization.

861168685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427428.

The product of its digits is 552960, while the sum is 49.

The square root of 861168685 is about 29345.6757461811. The cubic root of 861168685 is about 951.3991148007.

The spelling of 861168685 in words is "eight hundred sixty-one million, one hundred sixty-eight thousand, six hundred eighty-five".