686838437532 has 36 divisors (see below), whose sum is σ = 1869726859000. Its totient is φ = 211334903712.

The previous prime is 686838437489. The next prime is 686838437557. The reversal of 686838437532 is 235734838686.

686838437532 is a `hidden beast` number, since 6 + 8 + 68 + 3 + 8 + 4 + 37 + 532 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 686838437532.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 733801282 + ... + 733802217.

Almost surely, 2^686838437532 is an apocalyptic number.

It is an amenable number.

686838437532 is an abundant number, since it is smaller than the sum of its proper divisors (1182888421468).

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

686838437532 is a wasteful number, since it uses less digits than its factorization.

686838437532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467603522 (or 1467603517 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 63.

The spelling of 686838437532 in words is "six hundred eighty-six billion, eight hundred thirty-eight million, four hundred thirty-seven thousand, five hundred thirty-two".