15399380849 has 2 divisors, whose sum is σ = 15399380850. Its totient is φ = 15399380848.

The previous prime is 15399380837. The next prime is 15399380863. The reversal of 15399380849 is 94808399351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15390139249 + 9241600 = 124057^2 + 3040^2 .

It is an emirp because it is prime and its reverse (94808399351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15399380849 - 2³² = 11104413553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15399380819) 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, 7699690424 + 7699690425.

It is an arithmetic number, because the mean of its divisors is an integer number (7699690425).

Almost surely, 2^15399380849 is an apocalyptic number.

It is an amenable number.

15399380849 is a deficient number, since it is larger than the sum of its proper divisors (1).

15399380849 is an equidigital number, since it uses as much as digits as its factorization.

15399380849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 59.

The spelling of 15399380849 in words is "fifteen billion, three hundred ninety-nine million, three hundred eighty thousand, eight hundred forty-nine".