13256940497 has 2 divisors, whose sum is σ = 13256940498. Its totient is φ = 13256940496.

The previous prime is 13256940479. The next prime is 13256940517. The reversal of 13256940497 is 79404965231.

Together with previous prime (13256940479) 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., 10545030721 + 2711909776 = 102689^2 + 52076^2 .

It is a cyclic number.

It is not a de Polignac number, because 13256940497 - 2¹² = 13256936401 is a prime.

It is not a weakly prime, because it can be changed into another prime (13256940407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6628470248 + 6628470249.

It is an arithmetic number, because the mean of its divisors is an integer number (6628470249).

Almost surely, 2^13256940497 is an apocalyptic number.

It is an amenable number.

13256940497 is a deficient number, since it is larger than the sum of its proper divisors (1).

13256940497 is an equidigital number, since it uses as much as digits as its factorization.

13256940497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 13256940497 in words is "thirteen billion, two hundred fifty-six million, nine hundred forty thousand, four hundred ninety-seven".