64186274137 has 2 divisors, whose sum is σ = 64186274138. Its totient is φ = 64186274136.

The previous prime is 64186274063. The next prime is 64186274143. The reversal of 64186274137 is 73147268146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56253878041 + 7932396096 = 237179^2 + 89064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64186274137 is a prime.

It is not a weakly prime, because it can be changed into another prime (64186274237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32093137068 + 32093137069.

It is an arithmetic number, because the mean of its divisors is an integer number (32093137069).

Almost surely, 2^64186274137 is an apocalyptic number.

It is an amenable number.

64186274137 is a deficient number, since it is larger than the sum of its proper divisors (1).

64186274137 is an equidigital number, since it uses as much as digits as its factorization.

64186274137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The spelling of 64186274137 in words is "sixty-four billion, one hundred eighty-six million, two hundred seventy-four thousand, one hundred thirty-seven".