26442181659 has 4 divisors (see below), whose sum is σ = 35256242216. Its totient is φ = 17628121104.

The previous prime is 26442181567. The next prime is 26442181663. The reversal of 26442181659 is 95618124462.

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

It is not a de Polignac number, because 26442181659 - 2¹² = 26442177563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26442181669) 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, 4407030274 + ... + 4407030279.

It is an arithmetic number, because the mean of its divisors is an integer number (8814060554).

Almost surely, 2^26442181659 is an apocalyptic number.

26442181659 is a deficient number, since it is larger than the sum of its proper divisors (8814060557).

26442181659 is an equidigital number, since it uses as much as digits as its factorization.

26442181659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8814060556.

The product of its digits is 829440, while the sum is 48.

The spelling of 26442181659 in words is "twenty-six billion, four hundred forty-two million, one hundred eighty-one thousand, six hundred fifty-nine".