686364691200 has 432 divisors, whose sum is σ = 2410670707200. Its totient is φ = 171382210560.

The previous prime is 686364691087. The next prime is 686364691211. The reversal of 686364691200 is 2196463686.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64948317 + ... + 64958883.

Almost surely, 2^686364691200 is an apocalyptic number.

686364691200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686364691200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205335353600).

686364691200 is an abundant number, since it is smaller than the sum of its proper divisors (1724306016000).

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

686364691200 is a wasteful number, since it uses less digits than its factorization.

686364691200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10812 (or 10793 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 686364691200 in words is "six hundred eighty-six billion, three hundred sixty-four million, six hundred ninety-one thousand, two hundred".