685808090770 has 64 divisors (see below), whose sum is σ = 1350405374976. Its totient is φ = 248695418880.

The previous prime is 685808090731. The next prime is 685808090831. The reversal of 685808090770 is 77090808586.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65229034 + ... + 65239546.

It is an arithmetic number, because the mean of its divisors is an integer number (21100083984).

Almost surely, 2^685808090770 is an apocalyptic number.

685808090770 is a deficient number, since it is larger than the sum of its proper divisors (664597284206).

685808090770 is a wasteful number, since it uses less digits than its factorization.

685808090770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12115.

The product of its (nonzero) digits is 6773760, while the sum is 58.

The spelling of 685808090770 in words is "six hundred eighty-five billion, eight hundred eight million, ninety thousand, seven hundred seventy".