16525088838509 has 2 divisors, whose sum is σ = 16525088838510. Its totient is φ = 16525088838508.

The previous prime is 16525088838481. The next prime is 16525088838539. The reversal of 16525088838509 is 90583888052561.

16525088838509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10872121344100 + 5652967494409 = 3297290^2 + 2377597^2 .

It is a cyclic number.

It is not a de Polignac number, because 16525088838509 - 2¹² = 16525088834413 is a prime.

It is a super-2 number, since 2×16525088838509² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16525088838539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8262544419254 + 8262544419255.

It is an arithmetic number, because the mean of its divisors is an integer number (8262544419255).

Almost surely, 2^{16525088838509} is an apocalyptic number.

It is an amenable number.

16525088838509 is a deficient number, since it is larger than the sum of its proper divisors (1).

16525088838509 is an equidigital number, since it uses as much as digits as its factorization.

16525088838509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888000, while the sum is 68.

The spelling of 16525088838509 in words is "sixteen trillion, five hundred twenty-five billion, eighty-eight million, eight hundred thirty-eight thousand, five hundred nine".