15611642089 has 2 divisors, whose sum is σ = 15611642090. Its totient is φ = 15611642088.

The previous prime is 15611642071. The next prime is 15611642143. The reversal of 15611642089 is 98024611651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15603757225 + 7884864 = 124915^2 + 2808^2 .

It is a cyclic number.

It is not a de Polignac number, because 15611642089 - 2¹³ = 15611633897 is a prime.

It is not a weakly prime, because it can be changed into another prime (15611642009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7805821044 + 7805821045.

It is an arithmetic number, because the mean of its divisors is an integer number (7805821045).

Almost surely, 2^15611642089 is an apocalyptic number.

It is an amenable number.

15611642089 is a deficient number, since it is larger than the sum of its proper divisors (1).

15611642089 is an equidigital number, since it uses as much as digits as its factorization.

15611642089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 15611642089 in words is "fifteen billion, six hundred eleven million, six hundred forty-two thousand, eighty-nine".