13005292536721 has 4 divisors (see below), whose sum is σ = 13052243051572. Its totient is φ = 12958342021872.

The previous prime is 13005292536689. The next prime is 13005292536763. The reversal of 13005292536721 is 12763529250031.

13005292536721 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.

It can be written as a sum of positive squares in 2 ways, for example, as 4554963303696 + 8450329233025 = 2134236^2 + 2906945^2 .

It is a cyclic number.

It is not a de Polignac number, because 13005292536721 - 2⁵ = 13005292536689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13005292536781) 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, 23475257010 + ... + 23475257563.

It is an arithmetic number, because the mean of its divisors is an integer number (3263060762893).

Almost surely, 2^{13005292536721} is an apocalyptic number.

It is an amenable number.

13005292536721 is a deficient number, since it is larger than the sum of its proper divisors (46950514851).

13005292536721 is an equidigital number, since it uses as much as digits as its factorization.

13005292536721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46950514850.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 13005292536721 in words is "thirteen trillion, five billion, two hundred ninety-two million, five hundred thirty-six thousand, seven hundred twenty-one".