686159512049 has 96 divisors (see below), whose sum is σ = 825604620288. Its totient is φ = 568207094400.

The previous prime is 686159512033. The next prime is 686159512061. The reversal of 686159512049 is 940215951686.

686159512049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 686159512049 - 2⁴ = 686159512033 is a prime.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 686159511985 and 686159512003.

It is not an unprimeable number, because it can be changed into a prime (686159512019) 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, 1869644264 + ... + 1869644630.

It is an arithmetic number, because the mean of its divisors is an integer number (8600048128).

Almost surely, 2^686159512049 is an apocalyptic number.

It is an amenable number.

686159512049 is a deficient number, since it is larger than the sum of its proper divisors (139445108239).

686159512049 is a wasteful number, since it uses less digits than its factorization.

686159512049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 686159512049 in words is "six hundred eighty-six billion, one hundred fifty-nine million, five hundred twelve thousand, forty-nine".