12571815889 has 2 divisors, whose sum is σ = 12571815890. Its totient is φ = 12571815888.

The previous prime is 12571815797. The next prime is 12571815929. The reversal of 12571815889 is 98851817521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7447690000 + 5124125889 = 86300^2 + 71583^2 .

It is a cyclic number.

It is not a de Polignac number, because 12571815889 - 2¹¹ = 12571813841 is a prime.

It is not a weakly prime, because it can be changed into another prime (12571815989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6285907944 + 6285907945.

It is an arithmetic number, because the mean of its divisors is an integer number (6285907945).

Almost surely, 2^12571815889 is an apocalyptic number.

It is an amenable number.

12571815889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12571815889 is an equidigital number, since it uses as much as digits as its factorization.

12571815889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 55.

The spelling of 12571815889 in words is "twelve billion, five hundred seventy-one million, eight hundred fifteen thousand, eight hundred eighty-nine".