15218939459 has 2 divisors, whose sum is σ = 15218939460. Its totient is φ = 15218939458.

The previous prime is 15218939431. The next prime is 15218939503. The reversal of 15218939459 is 95493981251.

15218939459 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 is a cyclic number.

It is not a de Polignac number, because 15218939459 - 2²⁴ = 15202162243 is a prime.

It is a super-2 number, since 2×15218939459² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15218939429) 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, 7609469729 + 7609469730.

It is an arithmetic number, because the mean of its divisors is an integer number (7609469730).

Almost surely, 2^15218939459 is an apocalyptic number.

15218939459 is a deficient number, since it is larger than the sum of its proper divisors (1).

15218939459 is an equidigital number, since it uses as much as digits as its factorization.

15218939459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 56.

The spelling of 15218939459 in words is "fifteen billion, two hundred eighteen million, nine hundred thirty-nine thousand, four hundred fifty-nine".