2126256562613 has 2 divisors, whose sum is σ = 2126256562614. Its totient is φ = 2126256562612.

The previous prime is 2126256562597. The next prime is 2126256562631. The reversal of 2126256562613 is 3162656526212.

Together with next prime (2126256562631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1607616054724 + 518640507889 = 1267918^2 + 720167^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126256562613 - 2⁴ = 2126256562597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2126256567613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063128281306 + 1063128281307.

It is an arithmetic number, because the mean of its divisors is an integer number (1063128281307).

Almost surely, 2^{2126256562613} is an apocalyptic number.

It is an amenable number.

2126256562613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126256562613 is an equidigital number, since it uses as much as digits as its factorization.

2126256562613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 47.

The spelling of 2126256562613 in words is "two trillion, one hundred twenty-six billion, two hundred fifty-six million, five hundred sixty-two thousand, six hundred thirteen".