2686311729 has 16 divisors (see below), whose sum is σ = 4213823040. Its totient is φ = 1685528640.

The previous prime is 2686311709. The next prime is 2686311737. The reversal of 2686311729 is 9271136862.

2686311729 is a `hidden beast` number, since 2 + 6 + 8 + 631 + 1 + 7 + 2 + 9 = 666.

It is not a de Polignac number, because 2686311729 - 2⁵ = 2686311697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2686311709) 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, 2925807 + ... + 2926724.

It is an arithmetic number, because the mean of its divisors is an integer number (263363940).

Almost surely, 2^2686311729 is an apocalyptic number.

It is an amenable number.

2686311729 is a deficient number, since it is larger than the sum of its proper divisors (1527511311).

2686311729 is a wasteful number, since it uses less digits than its factorization.

2686311729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852557 (or 5852551 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 2686311729 is about 51829.6414129984. The cubic root of 2686311729 is about 1390.1195020009.

The spelling of 2686311729 in words is "two billion, six hundred eighty-six million, three hundred eleven thousand, seven hundred twenty-nine".