685788887586 has 32 divisors (see below), whose sum is σ = 1511081199936. Its totient is φ = 205757240000.

The previous prime is 685788887573. The next prime is 685788887593.

685788887586 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 685788887499 and 685788887508.

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, 51432645 + ... + 51445976.

It is an arithmetic number, because the mean of its divisors is an integer number (47221287498).

Almost surely, 2^685788887586 is an apocalyptic number.

685788887586 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

685788887586 is an abundant number, since it is smaller than the sum of its proper divisors (825292312350).

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

685788887586 is a wasteful number, since it uses less digits than its factorization.

685788887586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102878738.

The product of its digits is 11560550400, while the sum is 84.

The spelling of 685788887586 in words is "six hundred eighty-five billion, seven hundred eighty-eight million, eight hundred eighty-seven thousand, five hundred eighty-six".