686251647045 has 24 divisors (see below), whose sum is σ = 1189620143712. Its totient is φ = 365964789600.

The previous prime is 686251647019. The next prime is 686251647049. The reversal of 686251647045 is 540746152686.

686251647045 is a `hidden beast` number, since 6 + 8 + 625 + 1 + 6 + 4 + 7 + 0 + 4 + 5 = 666.

It is not a de Polignac number, because 686251647045 - 2⁶ = 686251646981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686251646982 and 686251647000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686251647049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287251 + ... + 1206240.

It is an arithmetic number, because the mean of its divisors is an integer number (49567505988).

Almost surely, 2^686251647045 is an apocalyptic number.

It is an amenable number.

686251647045 is a deficient number, since it is larger than the sum of its proper divisors (503368496667).

686251647045 is a wasteful number, since it uses less digits than its factorization.

686251647045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503713 (or 1503710 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 686251647045 in words is "six hundred eighty-six billion, two hundred fifty-one million, six hundred forty-seven thousand, forty-five".