2686138767815 has 4 divisors (see below), whose sum is σ = 3223366521384. Its totient is φ = 2148911014248.

The previous prime is 2686138767743. The next prime is 2686138767869. The reversal of 2686138767815 is 5187678316862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2686138767815 - 2¹⁰ = 2686138766791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268613876777 + ... + 268613876786.

It is an arithmetic number, because the mean of its divisors is an integer number (805841630346).

Almost surely, 2^{2686138767815} is an apocalyptic number.

2686138767815 is a deficient number, since it is larger than the sum of its proper divisors (537227753569).

2686138767815 is an equidigital number, since it uses as much as digits as its factorization.

2686138767815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537227753568.

The product of its digits is 162570240, while the sum is 68.

The spelling of 2686138767815 in words is "two trillion, six hundred eighty-six billion, one hundred thirty-eight million, seven hundred sixty-seven thousand, eight hundred fifteen".