685624047952 has 20 divisors (see below), whose sum is σ = 1398312203680. Its totient is φ = 324769285728.

The previous prime is 685624047949. The next prime is 685624047961. The reversal of 685624047952 is 259740426586.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127670828 + ... + 1127671435.

It is an arithmetic number, because the mean of its divisors is an integer number (69915610184).

Almost surely, 2^685624047952 is an apocalyptic number.

It is an amenable number.

685624047952 is an abundant number, since it is smaller than the sum of its proper divisors (712688155728).

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

685624047952 is a wasteful number, since it uses less digits than its factorization.

685624047952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255342290 (or 2255342284 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 58.

The spelling of 685624047952 in words is "six hundred eighty-five billion, six hundred twenty-four million, forty-seven thousand, nine hundred fifty-two".