686993409432 has 96 divisors (see below), whose sum is σ = 2041093080000. Its totient is φ = 207016762560.

The previous prime is 686993409373. The next prime is 686993409457. The reversal of 686993409432 is 234904399686.

686993409432 is a `hidden beast` number, since 6 + 86 + 99 + 34 + 0 + 9 + 432 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 686993409432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2281182 + ... + 2564717.

It is an arithmetic number, because the mean of its divisors is an integer number (21261386250).

Almost surely, 2^686993409432 is an apocalyptic number.

It is an amenable number.

686993409432 is an abundant number, since it is smaller than the sum of its proper divisors (1354099670568).

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

686993409432 is a wasteful number, since it uses less digits than its factorization.

686993409432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846101 (or 4846094 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 63.

The spelling of 686993409432 in words is "six hundred eighty-six billion, nine hundred ninety-three million, four hundred nine thousand, four hundred thirty-two".