13526125621 has 2 divisors, whose sum is σ = 13526125622. Its totient is φ = 13526125620.

The previous prime is 13526125603. The next prime is 13526125649. The reversal of 13526125621 is 12652162531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10314636721 + 3211488900 = 101561^2 + 56670^2 .

It is a cyclic number.

It is not a de Polignac number, because 13526125621 - 2⁵ = 13526125589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13526125661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6763062810 + 6763062811.

It is an arithmetic number, because the mean of its divisors is an integer number (6763062811).

Almost surely, 2^13526125621 is an apocalyptic number.

It is an amenable number.

13526125621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13526125621 is an equidigital number, since it uses as much as digits as its factorization.

13526125621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The spelling of 13526125621 in words is "thirteen billion, five hundred twenty-six million, one hundred twenty-five thousand, six hundred twenty-one".