126403643213 has 16 divisors (see below), whose sum is σ = 135608832000. Its totient is φ = 117470651760.

The previous prime is 126403643207. The next prime is 126403643227. The reversal of 126403643213 is 312346304621.

It is a cyclic number.

It is not a de Polignac number, because 126403643213 - 2³⁴ = 109223774029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126403643203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33020 + ... + 503882.

It is an arithmetic number, because the mean of its divisors is an integer number (8475552000).

Almost surely, 2^126403643213 is an apocalyptic number.

It is an amenable number.

126403643213 is a deficient number, since it is larger than the sum of its proper divisors (9205188787).

126403643213 is a wasteful number, since it uses less digits than its factorization.

126403643213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471152.

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 126403643213 its reverse (312346304621), we get a palindrome (438749947834).

The spelling of 126403643213 in words is "one hundred twenty-six billion, four hundred three million, six hundred forty-three thousand, two hundred thirteen".