685396295982 has 24 divisors (see below), whose sum is σ = 1485748732104. Its totient is φ = 228354135984.

The previous prime is 685396295977. The next prime is 685396296001. The reversal of 685396295982 is 289592693586.

685396295982 is a `hidden beast` number, since 6 + 8 + 5 + 3 + 9 + 6 + 29 + 598 + 2 = 666.

685396295982 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 685396295982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9236688 + ... + 9310595.

It is an arithmetic number, because the mean of its divisors is an integer number (61906197171).

Almost surely, 2^685396295982 is an apocalyptic number.

685396295982 is an abundant number, since it is smaller than the sum of its proper divisors (800352436122).

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

685396295982 is a wasteful number, since it uses less digits than its factorization.

685396295982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18549344 (or 18549341 counting only the distinct ones).

The product of its digits is 503884800, while the sum is 72.

The spelling of 685396295982 in words is "six hundred eighty-five billion, three hundred ninety-six million, two hundred ninety-five thousand, nine hundred eighty-two".