2164726274639 has 2 divisors, whose sum is σ = 2164726274640. Its totient is φ = 2164726274638.

The previous prime is 2164726274567. The next prime is 2164726274749. The reversal of 2164726274639 is 9364726274612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2164726274639 is a prime.

It is a super-2 number, since 2×2164726274639² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2164726270639) 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 as a sum of consecutive naturals, namely, 1082363137319 + 1082363137320.

It is an arithmetic number, because the mean of its divisors is an integer number (1082363137320).

Almost surely, 2^{2164726274639} is an apocalyptic number.

2164726274639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164726274639 is an equidigital number, since it uses as much as digits as its factorization.

2164726274639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 59.

The spelling of 2164726274639 in words is "two trillion, one hundred sixty-four billion, seven hundred twenty-six million, two hundred seventy-four thousand, six hundred thirty-nine".