2961686856 has 16 divisors (see below), whose sum is σ = 7404217200. Its totient is φ = 987228944.

The previous prime is 2961686843. The next prime is 2961686873. The reversal of 2961686856 is 6586861692.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2961686796 and 2961686805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61701786 + ... + 61701833.

It is an arithmetic number, because the mean of its divisors is an integer number (462763575).

Almost surely, 2^2961686856 is an apocalyptic number.

It is an amenable number.

2961686856 is an abundant number, since it is smaller than the sum of its proper divisors (4442530344).

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

2961686856 is a wasteful number, since it uses less digits than its factorization.

2961686856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123403628 (or 123403624 counting only the distinct ones).

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

The square root of 2961686856 is about 54421.3823418700. The cubic root of 2961686856 is about 1436.0835670623.

The spelling of 2961686856 in words is "two billion, nine hundred sixty-one million, six hundred eighty-six thousand, eight hundred fifty-six".