15552125509 has 2 divisors, whose sum is σ = 15552125510. Its totient is φ = 15552125508.

The previous prime is 15552125447. The next prime is 15552125549. The reversal of 15552125509 is 90552125551.

It is an a-pointer prime, because the next prime (15552125549) can be obtained adding 15552125509 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10358761284 + 5193364225 = 101778^2 + 72065^2 .

It is a cyclic number.

It is not a de Polignac number, because 15552125509 - 2²⁷ = 15417907781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15552125549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7776062754 + 7776062755.

It is an arithmetic number, because the mean of its divisors is an integer number (7776062755).

Almost surely, 2^15552125509 is an apocalyptic number.

It is an amenable number.

15552125509 is a deficient number, since it is larger than the sum of its proper divisors (1).

15552125509 is an equidigital number, since it uses as much as digits as its factorization.

15552125509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 15552125509 in words is "fifteen billion, five hundred fifty-two million, one hundred twenty-five thousand, five hundred nine".