26264456621 has 8 divisors (see below), whose sum is σ = 28672263480. Its totient is φ = 23912001792.

The previous prime is 26264456609. The next prime is 26264456749. The reversal of 26264456621 is 12665446262.

It can be written as a sum of positive squares in 4 ways, for example, as 688900 + 26263767721 = 830^2 + 162061^2 .

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 26264456621 - 2⁶ = 26264456557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26264456021) 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, 13837016 + ... + 13838913.

It is an arithmetic number, because the mean of its divisors is an integer number (3584032935).

Almost surely, 2^26264456621 is an apocalyptic number.

It is an amenable number.

26264456621 is a deficient number, since it is larger than the sum of its proper divisors (2407806859).

26264456621 is a wasteful number, since it uses less digits than its factorization.

26264456621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27676015.

The product of its digits is 829440, while the sum is 44.

The spelling of 26264456621 in words is "twenty-six billion, two hundred sixty-four million, four hundred fifty-six thousand, six hundred twenty-one".