27726443409 has 16 divisors (see below), whose sum is σ = 42310983680. Its totient is φ = 15820745040.

The previous prime is 27726443383. The next prime is 27726443411. The reversal of 27726443409 is 90434462772.

It is a happy number.

It is not a de Polignac number, because 27726443409 - 2⁷ = 27726443281 is a prime.

It is a super-2 number, since 2×27726443409² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27726443429) 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, 940849 + ... + 969870.

It is an arithmetic number, because the mean of its divisors is an integer number (2644436480).

Almost surely, 2^27726443409 is an apocalyptic number.

It is an amenable number.

27726443409 is a deficient number, since it is larger than the sum of its proper divisors (14584540271).

27726443409 is a wasteful number, since it uses less digits than its factorization.

27726443409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911420.

The product of its (nonzero) digits is 2032128, while the sum is 48.

The spelling of 27726443409 in words is "twenty-seven billion, seven hundred twenty-six million, four hundred forty-three thousand, four hundred nine".