26221535872 has 32 divisors (see below), whose sum is σ = 59700820320. Its totient is φ = 11237800704.

The previous prime is 26221535831. The next prime is 26221535887. The reversal of 26221535872 is 27853512262.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14631658 + ... + 14633449.

It is an arithmetic number, because the mean of its divisors is an integer number (1865650635).

Almost surely, 2^26221535872 is an apocalyptic number.

It is an amenable number.

26221535872 is an abundant number, since it is smaller than the sum of its proper divisors (33479284448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26221535872 is an equidigital number, since it uses as much as digits as its factorization.

26221535872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29265128 (or 29265116 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The spelling of 26221535872 in words is "twenty-six billion, two hundred twenty-one million, five hundred thirty-five thousand, eight hundred seventy-two".