26105666243 has 8 divisors (see below), whose sum is σ = 26370447600. Its totient is φ = 25841008800.

The previous prime is 26105666207. The next prime is 26105666263. The reversal of 26105666243 is 34266650162.

It is a happy number.

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 26105666243 - 2¹⁰ = 26105665219 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 26105666243.

It is not an unprimeable number, because it can be changed into a prime (26105666263) 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, 426533 + ... + 483881.

It is an arithmetic number, because the mean of its divisors is an integer number (3296305950).

Almost surely, 2^26105666243 is an apocalyptic number.

26105666243 is a deficient number, since it is larger than the sum of its proper divisors (264781357).

26105666243 is a wasteful number, since it uses less digits than its factorization.

26105666243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61957.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 26105666243 in words is "twenty-six billion, one hundred five million, six hundred sixty-six thousand, two hundred forty-three".