686746193400 has 96 divisors (see below), whose sum is σ = 2365459129200. Its totient is φ = 183132316800.

The previous prime is 686746193363. The next prime is 686746193407. The reversal of 686746193400 is 4391647686.

686746193400 is a `hidden beast` number, since 6 + 8 + 6 + 7 + 46 + 193 + 400 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686746193407) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 63582211 + ... + 63593010.

Almost surely, 2^686746193400 is an apocalyptic number.

686746193400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686746193400 is an abundant number, since it is smaller than the sum of its proper divisors (1678712935800).

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

686746193400 is a wasteful number, since it uses less digits than its factorization.

686746193400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127175246 (or 127175231 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 686746193400 in words is "six hundred eighty-six billion, seven hundred forty-six million, one hundred ninety-three thousand, four hundred".