686611701825 has 96 divisors (see below), whose sum is σ = 1351509688320. Its totient is φ = 300966969600.

The previous prime is 686611701821. The next prime is 686611701859. The reversal of 686611701825 is 528107116686.

It is not a de Polignac number, because 686611701825 - 2² = 686611701821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686611701821) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1580452 + ... + 1967498.

It is an arithmetic number, because the mean of its divisors is an integer number (14078225920).

Almost surely, 2^686611701825 is an apocalyptic number.

It is an amenable number.

686611701825 is a deficient number, since it is larger than the sum of its proper divisors (664897986495).

686611701825 is a wasteful number, since it uses less digits than its factorization.

686611701825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387207 (or 387202 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 686611701825 in words is "six hundred eighty-six billion, six hundred eleven million, seven hundred one thousand, eight hundred twenty-five".