15620241509 has 2 divisors, whose sum is σ = 15620241510. Its totient is φ = 15620241508.

The previous prime is 15620241499. The next prime is 15620241521. The reversal of 15620241509 is 90514202651.

It is a happy number.

15620241509 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., 9234633409 + 6385608100 = 96097^2 + 79910^2 .

It is a cyclic number.

It is not a de Polignac number, because 15620241509 - 2¹⁶ = 15620175973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15620241569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7810120754 + 7810120755.

It is an arithmetic number, because the mean of its divisors is an integer number (7810120755).

Almost surely, 2^15620241509 is an apocalyptic number.

It is an amenable number.

15620241509 is a deficient number, since it is larger than the sum of its proper divisors (1).

15620241509 is an equidigital number, since it uses as much as digits as its factorization.

15620241509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 15620241509 in words is "fifteen billion, six hundred twenty million, two hundred forty-one thousand, five hundred nine".