26264315221 has 4 divisors (see below), whose sum is σ = 26267556672. Its totient is φ = 26261073772.

The previous prime is 26264315197. The next prime is 26264315237. The reversal of 26264315221 is 12251346262.

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 not a de Polignac number, because 26264315221 - 2¹⁵ = 26264282453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26264315261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608541 + ... + 1624786.

It is an arithmetic number, because the mean of its divisors is an integer number (6566889168).

Almost surely, 2^26264315221 is an apocalyptic number.

It is an amenable number.

26264315221 is a deficient number, since it is larger than the sum of its proper divisors (3241451).

26264315221 is an equidigital number, since it uses as much as digits as its factorization.

26264315221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241450.

The product of its digits is 34560, while the sum is 34.

The spelling of 26264315221 in words is "twenty-six billion, two hundred sixty-four million, three hundred fifteen thousand, two hundred twenty-one".