26445438869 has 4 divisors (see below), whose sum is σ = 26446491744. Its totient is φ = 26444385996.

The previous prime is 26445438853. The next prime is 26445438871. The reversal of 26445438869 is 96883454462.

It is a happy number.

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 26445438869 - 2⁴ = 26445438853 is a prime.

It is a super-2 number, since 2×26445438869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26445438809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487817 + ... + 539310.

It is an arithmetic number, because the mean of its divisors is an integer number (6611622936).

Almost surely, 2^26445438869 is an apocalyptic number.

It is an amenable number.

26445438869 is a deficient number, since it is larger than the sum of its proper divisors (1052875).

26445438869 is a wasteful number, since it uses less digits than its factorization.

26445438869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052874.

The product of its digits is 39813120, while the sum is 59.

The spelling of 26445438869 in words is "twenty-six billion, four hundred forty-five million, four hundred thirty-eight thousand, eight hundred sixty-nine".