15138500539 has 2 divisors, whose sum is σ = 15138500540. Its totient is φ = 15138500538.

The previous prime is 15138500521. The next prime is 15138500551. The reversal of 15138500539 is 93500583151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15138500539 - 2¹⁹ = 15137976251 is a prime.

It is not a weakly prime, because it can be changed into another prime (15138500519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7569250269 + 7569250270.

It is an arithmetic number, because the mean of its divisors is an integer number (7569250270).

Almost surely, 2^15138500539 is an apocalyptic number.

15138500539 is a deficient number, since it is larger than the sum of its proper divisors (1).

15138500539 is an equidigital number, since it uses as much as digits as its factorization.

15138500539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 40.

The spelling of 15138500539 in words is "fifteen billion, one hundred thirty-eight million, five hundred thousand, five hundred thirty-nine".