12964118081 has 4 divisors (see below), whose sum is σ = 12967465812. Its totient is φ = 12960770352.

The previous prime is 12964118029. The next prime is 12964118087. The reversal of 12964118081 is 18081146921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18081146921 = 4801 ⋅3766121.

It can be written as a sum of positive squares in 2 ways, for example, as 2379000625 + 10585117456 = 48775^2 + 102884^2 .

It is a cyclic number.

It is not a de Polignac number, because 12964118081 - 2⁶ = 12964118017 is a prime.

It is a super-2 number, since 2×12964118081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12964118087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668050 + ... + 1675803.

It is an arithmetic number, because the mean of its divisors is an integer number (3241866453).

Almost surely, 2^12964118081 is an apocalyptic number.

It is an amenable number.

12964118081 is a deficient number, since it is larger than the sum of its proper divisors (3347731).

12964118081 is an equidigital number, since it uses as much as digits as its factorization.

12964118081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347730.

The product of its (nonzero) digits is 27648, while the sum is 41.

The spelling of 12964118081 in words is "twelve billion, nine hundred sixty-four million, one hundred eighteen thousand, eighty-one".