856829701982 has 4 divisors (see below), whose sum is σ = 1285244552976. Its totient is φ = 428414850990.

The previous prime is 856829701979. The next prime is 856829701991. The reversal of 856829701982 is 289107928658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289107928658 = 2 ⋅144553964329.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214207425494 + ... + 214207425497.

It is an arithmetic number, because the mean of its divisors is an integer number (321311138244).

Almost surely, 2^856829701982 is an apocalyptic number.

856829701982 is a deficient number, since it is larger than the sum of its proper divisors (428414850994).

856829701982 is a wasteful number, since it uses less digits than its factorization.

856829701982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428414850993.

The product of its (nonzero) digits is 34836480, while the sum is 65.

The spelling of 856829701982 in words is "eight hundred fifty-six billion, eight hundred twenty-nine million, seven hundred one thousand, nine hundred eighty-two".