856980854829 has 48 divisors (see below), whose sum is σ = 1389887972928. Its totient is φ = 504312480000.

The previous prime is 856980854819. The next prime is 856980854843. The reversal of 856980854829 is 928458089658.

856980854829 is a `hidden beast` number, since 8 + 5 + 69 + 8 + 0 + 85 + 482 + 9 = 666.

It is not a de Polignac number, because 856980854829 - 2⁴ = 856980854813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856980854819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 356139 + ... + 1356759.

It is an arithmetic number, because the mean of its divisors is an integer number (28955999436).

Almost surely, 2^856980854829 is an apocalyptic number.

It is an amenable number.

856980854829 is a deficient number, since it is larger than the sum of its proper divisors (532907118099).

856980854829 is a wasteful number, since it uses less digits than its factorization.

856980854829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000890 (or 1000887 counting only the distinct ones).

The product of its (nonzero) digits is 398131200, while the sum is 72.

The spelling of 856980854829 in words is "eight hundred fifty-six billion, nine hundred eighty million, eight hundred fifty-four thousand, eight hundred twenty-nine".