2636505881249 has 2 divisors, whose sum is σ = 2636505881250. Its totient is φ = 2636505881248.

The previous prime is 2636505881237. The next prime is 2636505881281. The reversal of 2636505881249 is 9421885056362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1708497339025 + 928008542224 = 1307095^2 + 963332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2636505881249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2636505880249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318252940624 + 1318252940625.

It is an arithmetic number, because the mean of its divisors is an integer number (1318252940625).

Almost surely, 2^{2636505881249} is an apocalyptic number.

It is an amenable number.

2636505881249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2636505881249 is an equidigital number, since it uses as much as digits as its factorization.

2636505881249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24883200, while the sum is 59.

The spelling of 2636505881249 in words is "two trillion, six hundred thirty-six billion, five hundred five million, eight hundred eighty-one thousand, two hundred forty-nine".