26286490409 has 4 divisors (see below), whose sum is σ = 26290497360. Its totient is φ = 26282483460.

The previous prime is 26286490403. The next prime is 26286490411. The reversal of 26286490409 is 90409468262.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-26286490409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26286490403) 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, 1993619 + ... + 2006760.

It is an arithmetic number, because the mean of its divisors is an integer number (6572624340).

Almost surely, 2^26286490409 is an apocalyptic number.

It is an amenable number.

26286490409 is a deficient number, since it is larger than the sum of its proper divisors (4006951).

26286490409 is an equidigital number, since it uses as much as digits as its factorization.

26286490409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006950.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 26286490409 in words is "twenty-six billion, two hundred eighty-six million, four hundred ninety thousand, four hundred nine".