856285230978 has 16 divisors (see below), whose sum is σ = 1902856068960. Its totient is φ = 285428410308.

The previous prime is 856285230971. The next prime is 856285231031. The reversal of 856285230978 is 879032582658.

856285230978 is a `hidden beast` number, since 8 + 56 + 285 + 230 + 9 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (856285230971) 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, 7928566900 + ... + 7928567007.

It is an arithmetic number, because the mean of its divisors is an integer number (118928504310).

Almost surely, 2^856285230978 is an apocalyptic number.

856285230978 is an abundant number, since it is smaller than the sum of its proper divisors (1046570837982).

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

856285230978 is a wasteful number, since it uses less digits than its factorization.

856285230978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15857133918 (or 15857133912 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 63.

The spelling of 856285230978 in words is "eight hundred fifty-six billion, two hundred eighty-five million, two hundred thirty thousand, nine hundred seventy-eight".