12511489889 has 2 divisors, whose sum is σ = 12511489890. Its totient is φ = 12511489888.

The previous prime is 12511489877. The next prime is 12511489937. The reversal of 12511489889 is 98898411521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11452638289 + 1058851600 = 107017^2 + 32540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12511489889 is a prime.

It is not a weakly prime, because it can be changed into another prime (12511482889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6255744944 + 6255744945.

It is an arithmetic number, because the mean of its divisors is an integer number (6255744945).

Almost surely, 2^12511489889 is an apocalyptic number.

It is an amenable number.

12511489889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12511489889 is an equidigital number, since it uses as much as digits as its factorization.

12511489889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 56.

The spelling of 12511489889 in words is "twelve billion, five hundred eleven million, four hundred eighty-nine thousand, eight hundred eighty-nine".