11391686837 has 4 divisors (see below), whose sum is σ = 11528936160. Its totient is φ = 11254437516.

The previous prime is 11391686833. The next prime is 11391686843. The reversal of 11391686837 is 73868619311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11391686837 - 2² = 11391686833 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 (11391686833) 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, 68624537 + ... + 68624702.

It is an arithmetic number, because the mean of its divisors is an integer number (2882234040).

Almost surely, 2^11391686837 is an apocalyptic number.

It is an amenable number.

11391686837 is a deficient number, since it is larger than the sum of its proper divisors (137249323).

11391686837 is an equidigital number, since it uses as much as digits as its factorization.

11391686837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137249322.

The product of its digits is 1306368, while the sum is 53.

The spelling of 11391686837 in words is "eleven billion, three hundred ninety-one million, six hundred eighty-six thousand, eight hundred thirty-seven".