684277585690 has 12 divisors (see below), whose sum is σ = 1231704362826. Its totient is φ = 273709987928.

The previous prime is 684277585669. The next prime is 684277585723. The reversal of 684277585690 is 96585772486.

It can be written as a sum of positive squares in only one way, i.e., 615849827121 + 68427758569 = 784761^2 + 261587^2 .

It is a super-2 number, since 2×684277585690² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2485077 + ... + 2746663.

Almost surely, 2^684277585690 is an apocalyptic number.

684277585690 is a deficient number, since it is larger than the sum of its proper divisors (547426777136).

684277585690 is an frugal number, since it uses more digits than its factorization.

684277585690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523181 (or 261594 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 67.

The spelling of 684277585690 in words is "six hundred eighty-four billion, two hundred seventy-seven million, five hundred eighty-five thousand, six hundred ninety".