12945351723 has 4 divisors (see below), whose sum is σ = 17260468968. Its totient is φ = 8630234480.

The previous prime is 12945351703. The next prime is 12945351733. The reversal of 12945351723 is 32715354921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12945351723 - 2¹⁰ = 12945350699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12945351703) 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, 2157558618 + ... + 2157558623.

It is an arithmetic number, because the mean of its divisors is an integer number (4315117242).

Almost surely, 2^12945351723 is an apocalyptic number.

12945351723 is a deficient number, since it is larger than the sum of its proper divisors (4315117245).

12945351723 is an equidigital number, since it uses as much as digits as its factorization.

12945351723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315117244.

The product of its digits is 226800, while the sum is 42.

The spelling of 12945351723 in words is "twelve billion, nine hundred forty-five million, three hundred fifty-one thousand, seven hundred twenty-three".