861335056 has 40 divisors (see below), whose sum is σ = 1860014880. Its totient is φ = 383998464.

The previous prime is 861335053. The next prime is 861335077. The reversal of 861335056 is 650533168.

861335056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (861335051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78166 + ... + 88501.

It is an arithmetic number, because the mean of its divisors is an integer number (46500372).

Almost surely, 2^861335056 is an apocalyptic number.

It is an amenable number.

861335056 is an abundant number, since it is smaller than the sum of its proper divisors (998679824).

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

861335056 is a wasteful number, since it uses less digits than its factorization.

861335056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166711 (or 166705 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 861335056 is about 29348.5102858731. The cubic root of 861335056 is about 951.4603784582.

Subtracting from 861335056 its product of nonzero digits (64800), we obtain a triangular number (861270256 = T₄₁₅₀₃).

The spelling of 861335056 in words is "eight hundred sixty-one million, three hundred thirty-five thousand, fifty-six".