685203413520 has 80 divisors (see below), whose sum is σ = 2192650947072. Its totient is φ = 176826685440.

The previous prime is 685203413467. The next prime is 685203413617. The reversal of 685203413520 is 25314302586.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 46041177 + ... + 46056056.

Almost surely, 2^685203413520 is an apocalyptic number.

685203413520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685203413520 is an abundant number, since it is smaller than the sum of its proper divisors (1507447533552).

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

685203413520 is a wasteful number, since it uses less digits than its factorization.

685203413520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92097280 (or 92097274 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 685203413520 in words is "six hundred eighty-five billion, two hundred three million, four hundred thirteen thousand, five hundred twenty".