15216516499 has 2 divisors, whose sum is σ = 15216516500. Its totient is φ = 15216516498.

The previous prime is 15216516473. The next prime is 15216516503. The reversal of 15216516499 is 99461561251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15216516499 - 2⁵ = 15216516467 is a prime.

It is not a weakly prime, because it can be changed into another prime (15216516299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7608258249 + 7608258250.

It is an arithmetic number, because the mean of its divisors is an integer number (7608258250).

Almost surely, 2^15216516499 is an apocalyptic number.

15216516499 is a deficient number, since it is larger than the sum of its proper divisors (1).

15216516499 is an equidigital number, since it uses as much as digits as its factorization.

15216516499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 49.

The spelling of 15216516499 in words is "fifteen billion, two hundred sixteen million, five hundred sixteen thousand, four hundred ninety-nine".