15556660459 has 2 divisors, whose sum is σ = 15556660460. Its totient is φ = 15556660458.

The previous prime is 15556660447. The next prime is 15556660531. The reversal of 15556660459 is 95406665551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15556660459 - 2³³ = 6966725867 is a prime.

It is a super-2 number, since 2×15556660459² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15556690459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7778330229 + 7778330230.

It is an arithmetic number, because the mean of its divisors is an integer number (7778330230).

Almost surely, 2^15556660459 is an apocalyptic number.

15556660459 is a deficient number, since it is larger than the sum of its proper divisors (1).

15556660459 is an equidigital number, since it uses as much as digits as its factorization.

15556660459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 15556660459 in words is "fifteen billion, five hundred fifty-six million, six hundred sixty thousand, four hundred fifty-nine".