126571994441 has 4 divisors (see below), whose sum is σ = 126698948292. Its totient is φ = 126445040592.

The previous prime is 126571994413. The next prime is 126571994443. The reversal of 126571994441 is 144499175621.

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 105687409216 + 20884585225 = 325096^2 + 144515^2 .

It is a cyclic number.

It is not a de Polignac number, because 126571994441 - 2²² = 126567800137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126571994443) 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, 63475430 + ... + 63477423.

It is an arithmetic number, because the mean of its divisors is an integer number (31674737073).

Almost surely, 2^126571994441 is an apocalyptic number.

It is an amenable number.

126571994441 is a deficient number, since it is larger than the sum of its proper divisors (126953851).

126571994441 is an equidigital number, since it uses as much as digits as its factorization.

126571994441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126953850.

The product of its digits is 2177280, while the sum is 53.

The spelling of 126571994441 in words is "one hundred twenty-six billion, five hundred seventy-one million, nine hundred ninety-four thousand, four hundred forty-one".