2136879718829 has 4 divisors (see below), whose sum is σ = 2136892739484. Its totient is φ = 2136866698176.

The previous prime is 2136879718807. The next prime is 2136879718873. The reversal of 2136879718829 is 9288179786312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 824778197929 + 1312101520900 = 908173^2 + 1145470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2136879718829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136879711829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6260972 + ... + 6593445.

It is an arithmetic number, because the mean of its divisors is an integer number (534223184871).

Almost surely, 2^{2136879718829} is an apocalyptic number.

It is an amenable number.

2136879718829 is a deficient number, since it is larger than the sum of its proper divisors (13020655).

2136879718829 is a wasteful number, since it uses less digits than its factorization.

2136879718829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13020654.

The product of its digits is 146313216, while the sum is 71.

The spelling of 2136879718829 in words is "two trillion, one hundred thirty-six billion, eight hundred seventy-nine million, seven hundred eighteen thousand, eight hundred twenty-nine".