12657723623 has 4 divisors (see below), whose sum is σ = 12658336320. Its totient is φ = 12657110928.

The previous prime is 12657723599. The next prime is 12657723629. The reversal of 12657723623 is 32632775621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32632775621 = 953 ⋅34242157.

It is a cyclic number.

It is not a de Polignac number, because 12657723623 - 2¹⁴ = 12657707239 is a prime.

It is a super-2 number, since 2×12657723623² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12657723629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274238 + ... + 317051.

It is an arithmetic number, because the mean of its divisors is an integer number (3164584080).

Almost surely, 2^12657723623 is an apocalyptic number.

12657723623 is a deficient number, since it is larger than the sum of its proper divisors (612697).

12657723623 is an equidigital number, since it uses as much as digits as its factorization.

12657723623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612696.

The product of its digits is 635040, while the sum is 44.

The spelling of 12657723623 in words is "twelve billion, six hundred fifty-seven million, seven hundred twenty-three thousand, six hundred twenty-three".