856861054 has 16 divisors (see below), whose sum is σ = 1469793888. Its totient is φ = 367003872.

The previous prime is 856861051. The next prime is 856861063. The reversal of 856861054 is 450168658.

It is a self number, because there is not a number n which added to its sum of digits gives 856861054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856861051) 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, 6604 + ... + 41920.

It is an arithmetic number, because the mean of its divisors is an integer number (91862118).

Almost surely, 2^856861054 is an apocalyptic number.

856861054 is a deficient number, since it is larger than the sum of its proper divisors (612932834).

856861054 is a wasteful number, since it uses less digits than its factorization.

856861054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37059.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 856861054 is about 29272.1890879381. The cubic root of 856861054 is about 949.8101389741.

The spelling of 856861054 in words is "eight hundred fifty-six million, eight hundred sixty-one thousand, fifty-four".