2168396186837 has 4 divisors (see below), whose sum is σ = 2205148664640. Its totient is φ = 2131643709036.

The previous prime is 2168396186809. The next prime is 2168396186851. The reversal of 2168396186837 is 7386816938612.

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 2168396186837 - 2²⁸ = 2168127751381 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 (2168396186897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18376238813 + ... + 18376238930.

It is an arithmetic number, because the mean of its divisors is an integer number (551287166160).

Almost surely, 2^{2168396186837} is an apocalyptic number.

It is an amenable number.

2168396186837 is a deficient number, since it is larger than the sum of its proper divisors (36752477803).

2168396186837 is an equidigital number, since it uses as much as digits as its factorization.

2168396186837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36752477802.

The product of its digits is 125411328, while the sum is 68.

The spelling of 2168396186837 in words is "two trillion, one hundred sixty-eight billion, three hundred ninety-six million, one hundred eighty-six thousand, eight hundred thirty-seven".