12457320723 has 10 divisors (see below), whose sum is σ = 18609084164. Its totient is φ = 8304880428.

The previous prime is 12457320713. The next prime is 12457320727. The reversal of 12457320723 is 32702375421.

12457320723 is a `hidden beast` number, since 12 + 4 + 573 + 2 + 0 + 72 + 3 = 666.

It is not a de Polignac number, because 12457320723 - 2²⁶ = 12390211859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12457320727) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76896961 + ... + 76897122.

Almost surely, 2^12457320723 is an apocalyptic number.

12457320723 is a deficient number, since it is larger than the sum of its proper divisors (6151763441).

12457320723 is an equidigital number, since it uses as much as digits as its factorization.

12457320723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153794095 (or 153794086 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The spelling of 12457320723 in words is "twelve billion, four hundred fifty-seven million, three hundred twenty thousand, seven hundred twenty-three".