12967521607 has 4 divisors (see below), whose sum is σ = 13212191880. Its totient is φ = 12722851336.

The previous prime is 12967521599. The next prime is 12967521617. The reversal of 12967521607 is 70612576921.

12967521607 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70612576921 = 223 ⋅316648327.

It is a cyclic number.

It is not a de Polignac number, because 12967521607 - 2³ = 12967521599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12967521617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122335057 + ... + 122335162.

It is an arithmetic number, because the mean of its divisors is an integer number (3303047970).

Almost surely, 2^12967521607 is an apocalyptic number.

12967521607 is a deficient number, since it is larger than the sum of its proper divisors (244670273).

12967521607 is an equidigital number, since it uses as much as digits as its factorization.

12967521607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244670272.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 12967521607 in words is "twelve billion, nine hundred sixty-seven million, five hundred twenty-one thousand, six hundred seven".