685247068368 has 60 divisors (see below), whose sum is σ = 1935334049220. Its totient is φ = 226320127488.

The previous prime is 685247068367. The next prime is 685247068393. The reversal of 685247068368 is 863860742586.

685247068368 is a `hidden beast` number, since 6 + 8 + 524 + 70 + 6 + 8 + 36 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 395600745024 + 289646323344 = 628968^2 + 538188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685247068361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21813021 + ... + 21844412.

It is an arithmetic number, because the mean of its divisors is an integer number (32255567487).

Almost surely, 2^685247068368 is an apocalyptic number.

It is an amenable number.

685247068368 is an abundant number, since it is smaller than the sum of its proper divisors (1250086980852).

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

685247068368 is a wasteful number, since it uses less digits than its factorization.

685247068368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43657556 (or 43657547 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 63.

The spelling of 685247068368 in words is "six hundred eighty-five billion, two hundred forty-seven million, sixty-eight thousand, three hundred sixty-eight".