12617989889 has 16 divisors (see below), whose sum is σ = 13461369600. Its totient is φ = 11792791296.

The previous prime is 12617989847. The next prime is 12617989933. The reversal of 12617989889 is 98898971621.

It is a cyclic number.

It is not a de Polignac number, because 12617989889 - 2³² = 8323022593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12617980889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2328347 + ... + 2333759.

It is an arithmetic number, because the mean of its divisors is an integer number (841335600).

Almost surely, 2^12617989889 is an apocalyptic number.

12617989889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12617989889 is a deficient number, since it is larger than the sum of its proper divisors (843379711).

12617989889 is a wasteful number, since it uses less digits than its factorization.

12617989889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064.

The product of its digits is 31352832, while the sum is 68.

The spelling of 12617989889 in words is "twelve billion, six hundred seventeen million, nine hundred eighty-nine thousand, eight hundred eighty-nine".