856979417016 has 64 divisors (see below), whose sum is σ = 2381228102400. Its totient is φ = 285572239200.

The previous prime is 856979417009. The next prime is 856979417027. The reversal of 856979417016 is 610714979658.

856979417016 is a `hidden beast` number, since 85 + 69 + 79 + 417 + 0 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100071 + ... + 1313001.

It is an arithmetic number, because the mean of its divisors is an integer number (37206689100).

Almost surely, 2^856979417016 is an apocalyptic number.

It is an amenable number.

856979417016 is an abundant number, since it is smaller than the sum of its proper divisors (1524248685384).

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

856979417016 is a wasteful number, since it uses less digits than its factorization.

856979417016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216217 (or 1216207 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 856979417016 in words is "eight hundred fifty-six billion, nine hundred seventy-nine million, four hundred seventeen thousand, sixteen".