686602249197 has 16 divisors (see below), whose sum is σ = 930703199040. Its totient is φ = 450121708800.

The previous prime is 686602249189. The next prime is 686602249279. The reversal of 686602249197 is 791942206686.

It is not a de Polignac number, because 686602249197 - 2³ = 686602249189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686602249197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686602242197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304197 + ... + 1210677.

It is an arithmetic number, because the mean of its divisors is an integer number (58168949940).

Almost surely, 2^686602249197 is an apocalyptic number.

It is an amenable number.

686602249197 is a deficient number, since it is larger than the sum of its proper divisors (244100949843).

686602249197 is a wasteful number, since it uses less digits than its factorization.

686602249197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910684.

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 686602249197 in words is "six hundred eighty-six billion, six hundred two million, two hundred forty-nine thousand, one hundred ninety-seven".