861481686 has 16 divisors (see below), whose sum is σ = 1855499184. Its totient is φ = 265071264.

The previous prime is 861481669. The next prime is 861481703. The reversal of 861481686 is 686184168.

It is an interprime number because it is at equal distance from previous prime (861481669) and next prime (861481703).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5522241 + ... + 5522396.

It is an arithmetic number, because the mean of its divisors is an integer number (115968699).

Almost surely, 2^861481686 is an apocalyptic number.

861481686 is an abundant number, since it is smaller than the sum of its proper divisors (994017498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861481686 is a wasteful number, since it uses less digits than its factorization.

861481686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11044655.

The product of its digits is 442368, while the sum is 48.

The square root of 861481686 is about 29351.0082620683. The cubic root of 861481686 is about 951.5143662447.

The spelling of 861481686 in words is "eight hundred sixty-one million, four hundred eighty-one thousand, six hundred eighty-six".