12438100417 has 4 divisors (see below), whose sum is σ = 12552211540. Its totient is φ = 12323989296.

The previous prime is 12438100387. The next prime is 12438100459. The reversal of 12438100417 is 71400183421.

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 4598060481 + 7840039936 = 67809^2 + 88544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12438100417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12438100117) 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, 57055398 + ... + 57055615.

It is an arithmetic number, because the mean of its divisors is an integer number (3138052885).

Almost surely, 2^12438100417 is an apocalyptic number.

It is an amenable number.

12438100417 is a deficient number, since it is larger than the sum of its proper divisors (114111123).

12438100417 is a wasteful number, since it uses less digits than its factorization.

12438100417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114111122.

The product of its (nonzero) digits is 5376, while the sum is 31.

Adding to 12438100417 its reverse (71400183421), we get a palindrome (83838283838).

The spelling of 12438100417 in words is "twelve billion, four hundred thirty-eight million, one hundred thousand, four hundred seventeen".