12640195089 has 6 divisors (see below), whose sum is σ = 18258059586. Its totient is φ = 8426796720.

The previous prime is 12640195069. The next prime is 12640195111. The reversal of 12640195089 is 98059104621.

12640195089 is a `hidden beast` number, since 126 + 4 + 0 + 19 + 508 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6961065489 + 5679129600 = 83433^2 + 75360^2 .

It is not a de Polignac number, because 12640195089 - 2¹⁵ = 12640162321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12640195049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702233052 + ... + 702233069.

It is an arithmetic number, because the mean of its divisors is an integer number (3043009931).

Almost surely, 2^12640195089 is an apocalyptic number.

It is an amenable number.

12640195089 is a deficient number, since it is larger than the sum of its proper divisors (5617864497).

12640195089 is a wasteful number, since it uses less digits than its factorization.

12640195089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404466127 (or 1404466124 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 12640195089 in words is "twelve billion, six hundred forty million, one hundred ninety-five thousand, eighty-nine".