26291379209 has 8 divisors (see below), whose sum is σ = 26858694528. Its totient is φ = 25724394160.

The previous prime is 26291379203. The next prime is 26291379211. The reversal of 26291379209 is 90297319262.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26291379209 - 2⁴ = 26291379193 is a prime.

It is a super-2 number, since 2×26291379209² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26291379203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81854 + ... + 243480.

It is an arithmetic number, because the mean of its divisors is an integer number (3357336816).

Almost surely, 2^26291379209 is an apocalyptic number.

It is an amenable number.

26291379209 is a deficient number, since it is larger than the sum of its proper divisors (567315319).

26291379209 is a wasteful number, since it uses less digits than its factorization.

26291379209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165135.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 26291379209 in words is "twenty-six billion, two hundred ninety-one million, three hundred seventy-nine thousand, two hundred nine".