685849398055 has 16 divisors (see below), whose sum is σ = 836547555744. Its totient is φ = 539661444480.

The previous prime is 685849398007. The next prime is 685849398083. The reversal of 685849398055 is 550893948586.

It is a happy number.

It is not a de Polignac number, because 685849398055 - 2²⁷ = 685715180327 is a prime.

It is a Duffinian number.

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, 11547264 + ... + 11606506.

It is an arithmetic number, because the mean of its divisors is an integer number (52284222234).

Almost surely, 2^685849398055 is an apocalyptic number.

685849398055 is a deficient number, since it is larger than the sum of its proper divisors (150698157689).

685849398055 is a wasteful number, since it uses less digits than its factorization.

685849398055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97266.

The product of its (nonzero) digits is 373248000, while the sum is 70.

The spelling of 685849398055 in words is "six hundred eighty-five billion, eight hundred forty-nine million, three hundred ninety-eight thousand, fifty-five".