15478716490009 has 2 divisors, whose sum is σ = 15478716490010. Its totient is φ = 15478716490008.

The previous prime is 15478716489983. The next prime is 15478716490057. The reversal of 15478716490009 is 90009461787451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15478716490000 + 9 = 3934300^2 + 3^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15478716490009 is a prime.

It is not a weakly prime, because it can be changed into another prime (15478716490079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7739358245004 + 7739358245005.

It is an arithmetic number, because the mean of its divisors is an integer number (7739358245005).

Almost surely, 2^{15478716490009} is an apocalyptic number.

It is an amenable number.

15478716490009 is a deficient number, since it is larger than the sum of its proper divisors (1).

15478716490009 is an equidigital number, since it uses as much as digits as its factorization.

15478716490009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 15478716490009 in words is "fifteen trillion, four hundred seventy-eight billion, seven hundred sixteen million, four hundred ninety thousand, nine".