126444444621 has 16 divisors (see below), whose sum is σ = 185020512768. Its totient is φ = 76174113200.

The previous prime is 126444444589. The next prime is 126444444671.

126444444621 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 126444444621 - 2⁵ = 126444444589 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126444444671) 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, 11466495 + ... + 11477516.

It is an arithmetic number, because the mean of its divisors is an integer number (11563782048).

Almost surely, 2^126444444621 is an apocalyptic number.

126444444621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126444444621 is a deficient number, since it is larger than the sum of its proper divisors (58576068147).

126444444621 is a wasteful number, since it uses less digits than its factorization.

126444444621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22944192.

The product of its digits is 589824, while the sum is 42.

The spelling of 126444444621 in words is "one hundred twenty-six billion, four hundred forty-four million, four hundred forty-four thousand, six hundred twenty-one".