26381090609 has 4 divisors (see below), whose sum is σ = 26389661760. Its totient is φ = 26372519460.

The previous prime is 26381090599. The next prime is 26381090623. The reversal of 26381090609 is 90609018362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26381090609 - 2¹² = 26381086513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26381090609.

It is not an unprimeable number, because it can be changed into a prime (26381090629) 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, 4280957 + ... + 4287114.

It is an arithmetic number, because the mean of its divisors is an integer number (6597415440).

Almost surely, 2^26381090609 is an apocalyptic number.

It is an amenable number.

26381090609 is a deficient number, since it is larger than the sum of its proper divisors (8571151).

26381090609 is an equidigital number, since it uses as much as digits as its factorization.

26381090609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8571150.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 26381090609 in words is "twenty-six billion, three hundred eighty-one million, ninety thousand, six hundred nine".