26142493217 has 4 divisors (see below), whose sum is σ = 26635747860. Its totient is φ = 25649238576.

The previous prime is 26142493213. The next prime is 26142493277. The reversal of 26142493217 is 71239424162.

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 20335900816 + 5806592401 = 142604^2 + 76201^2 .

It is a cyclic number.

It is not a de Polignac number, because 26142493217 - 2² = 26142493213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26142493213) 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, 246627242 + ... + 246627347.

It is an arithmetic number, because the mean of its divisors is an integer number (6658936965).

Almost surely, 2^26142493217 is an apocalyptic number.

It is an amenable number.

26142493217 is a deficient number, since it is larger than the sum of its proper divisors (493254643).

26142493217 is an equidigital number, since it uses as much as digits as its factorization.

26142493217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493254642.

The product of its digits is 145152, while the sum is 41.

The spelling of 26142493217 in words is "twenty-six billion, one hundred forty-two million, four hundred ninety-three thousand, two hundred seventeen".