12623654441 has 4 divisors (see below), whose sum is σ = 13058952900. Its totient is φ = 12188355984.

The previous prime is 12623654401. The next prime is 12623654447. The reversal of 12623654441 is 14445632621.

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 8682326041 + 3941328400 = 93179^2 + 62780^2 .

It is a cyclic number.

It is not a de Polignac number, because 12623654441 - 2¹⁰ = 12623653417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12623654395 and 12623654404.

It is not an unprimeable number, because it can be changed into a prime (12623654447) 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, 217649186 + ... + 217649243.

It is an arithmetic number, because the mean of its divisors is an integer number (3264738225).

Almost surely, 2^12623654441 is an apocalyptic number.

It is an amenable number.

12623654441 is a deficient number, since it is larger than the sum of its proper divisors (435298459).

12623654441 is an equidigital number, since it uses as much as digits as its factorization.

12623654441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435298458.

The product of its digits is 138240, while the sum is 38.

The spelling of 12623654441 in words is "twelve billion, six hundred twenty-three million, six hundred fifty-four thousand, four hundred forty-one".