126859666958621 has 16 divisors (see below), whose sum is σ = 129602669371200. Its totient is φ = 124146854832000.

The previous prime is 126859666958617. The next prime is 126859666958671.

126859666958621 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 126859666958621 - 2² = 126859666958617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126859666958671) 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, 21965150 + ... + 27132768.

It is an arithmetic number, because the mean of its divisors is an integer number (8100166835700).

Almost surely, 2^{126859666958621} is an apocalyptic number.

It is an amenable number.

126859666958621 is a deficient number, since it is larger than the sum of its proper divisors (2743002412579).

126859666958621 is a wasteful number, since it uses less digits than its factorization.

126859666958621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170540.

The product of its digits is 4031078400, while the sum is 80.

The spelling of 126859666958621 in words is "one hundred twenty-six trillion, eight hundred fifty-nine billion, six hundred sixty-six million, nine hundred fifty-eight thousand, six hundred twenty-one".