12072916645 has 4 divisors (see below), whose sum is σ = 14487499980. Its totient is φ = 9658333312.

The previous prime is 12072916589. The next prime is 12072916651. The reversal of 12072916645 is 54661927021.

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 3893884801 + 8179031844 = 62401^2 + 90438^2 .

It is a cyclic number.

It is not a de Polignac number, because 12072916645 - 2⁹ = 12072916133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207291660 + ... + 1207291669.

It is an arithmetic number, because the mean of its divisors is an integer number (3621874995).

Almost surely, 2^12072916645 is an apocalyptic number.

It is an amenable number.

12072916645 is a deficient number, since it is larger than the sum of its proper divisors (2414583335).

12072916645 is an equidigital number, since it uses as much as digits as its factorization.

12072916645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414583334.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 12072916645 in words is "twelve billion, seventy-two million, nine hundred sixteen thousand, six hundred forty-five".