15890948089 has 2 divisors, whose sum is σ = 15890948090. Its totient is φ = 15890948088.

The previous prime is 15890948081. The next prime is 15890948093. The reversal of 15890948089 is 98084909851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14328090000 + 1562858089 = 119700^2 + 39533^2 .

It is an emirp because it is prime and its reverse (98084909851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15890948089 - 2³ = 15890948081 is a prime.

It is not a weakly prime, because it can be changed into another prime (15890948081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7945474044 + 7945474045.

It is an arithmetic number, because the mean of its divisors is an integer number (7945474045).

Almost surely, 2^15890948089 is an apocalyptic number.

It is an amenable number.

15890948089 is a deficient number, since it is larger than the sum of its proper divisors (1).

15890948089 is an equidigital number, since it uses as much as digits as its factorization.

15890948089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 61.

The spelling of 15890948089 in words is "fifteen billion, eight hundred ninety million, nine hundred forty-eight thousand, eighty-nine".