2645744371537 has 2 divisors, whose sum is σ = 2645744371538. Its totient is φ = 2645744371536.

The previous prime is 2645744371507. The next prime is 2645744371549. The reversal of 2645744371537 is 7351734475462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2301170675521 + 344573696016 = 1516961^2 + 587004^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2645744371537 is a prime.

It is not a weakly prime, because it can be changed into another prime (2645744371507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322872185768 + 1322872185769.

It is an arithmetic number, because the mean of its divisors is an integer number (1322872185769).

Almost surely, 2^{2645744371537} is an apocalyptic number.

It is an amenable number.

2645744371537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645744371537 is an equidigital number, since it uses as much as digits as its factorization.

2645744371537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59270400, while the sum is 58.

The spelling of 2645744371537 in words is "two trillion, six hundred forty-five billion, seven hundred forty-four million, three hundred seventy-one thousand, five hundred thirty-seven".