687570779232 has 48 divisors (see below), whose sum is σ = 2005414775280. Its totient is φ = 229190259456.

The previous prime is 687570779227. The next prime is 687570779243. The reversal of 687570779232 is 232977075786.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 687570779232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397898893 + ... + 397900620.

It is an arithmetic number, because the mean of its divisors is an integer number (41779474485).

Almost surely, 2^687570779232 is an apocalyptic number.

It is an amenable number.

687570779232 is an abundant number, since it is smaller than the sum of its proper divisors (1317843996048).

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

687570779232 is a wasteful number, since it uses less digits than its factorization.

687570779232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795799532 (or 795799518 counting only the distinct ones).

The product of its (nonzero) digits is 62233920, while the sum is 63.

The spelling of 687570779232 in words is "six hundred eighty-seven billion, five hundred seventy million, seven hundred seventy-nine thousand, two hundred thirty-two".