126456055643 has 4 divisors (see below), whose sum is σ = 128599378680. Its totient is φ = 124312732608.

The previous prime is 126456055633. The next prime is 126456055709. The reversal of 126456055643 is 346550654621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126456055643 - 2¹⁰ = 126456054619 is a prime.

It is a super-2 number, since 2×126456055643² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126456055633) 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, 1071661430 + ... + 1071661547.

It is an arithmetic number, because the mean of its divisors is an integer number (32149844670).

Almost surely, 2^126456055643 is an apocalyptic number.

126456055643 is a deficient number, since it is larger than the sum of its proper divisors (2143323037).

126456055643 is an equidigital number, since it uses as much as digits as its factorization.

126456055643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143323036.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 126456055643 in words is "one hundred twenty-six billion, four hundred fifty-six million, fifty-five thousand, six hundred forty-three".