10002561265439 has 2 divisors, whose sum is σ = 10002561265440. Its totient is φ = 10002561265438.

The previous prime is 10002561265397. The next prime is 10002561265441. The reversal of 10002561265439 is 93456216520001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10002561265439 - 2²⁸ = 10002292829983 is a prime.

Together with 10002561265441, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10002561265439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002561265469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001280632719 + 5001280632720.

It is an arithmetic number, because the mean of its divisors is an integer number (5001280632720).

Almost surely, 2^{10002561265439} is an apocalyptic number.

10002561265439 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002561265439 is an equidigital number, since it uses as much as digits as its factorization.

10002561265439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 10002561265439 in words is "ten trillion, two billion, five hundred sixty-one million, two hundred sixty-five thousand, four hundred thirty-nine".