13525828709 has 2 divisors, whose sum is σ = 13525828710. Its totient is φ = 13525828708.

The previous prime is 13525828691. The next prime is 13525828721. The reversal of 13525828709 is 90782852531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12430020100 + 1095808609 = 111490^2 + 33103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13525828709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13525828759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6762914354 + 6762914355.

It is an arithmetic number, because the mean of its divisors is an integer number (6762914355).

Almost surely, 2^13525828709 is an apocalyptic number.

It is an amenable number.

13525828709 is a deficient number, since it is larger than the sum of its proper divisors (1).

13525828709 is an equidigital number, since it uses as much as digits as its factorization.

13525828709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 13525828709 in words is "thirteen billion, five hundred twenty-five million, eight hundred twenty-eight thousand, seven hundred nine".