26221045856 has 96 divisors (see below), whose sum is σ = 54656114688. Its totient is φ = 12358241280.

The previous prime is 26221045853. The next prime is 26221045891. The reversal of 26221045856 is 65854012262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26221045853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15235076 + ... + 15236796.

It is an arithmetic number, because the mean of its divisors is an integer number (569334528).

Almost surely, 2^26221045856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26221045856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27328057344).

26221045856 is an abundant number, since it is smaller than the sum of its proper divisors (28435068832).

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

26221045856 is a wasteful number, since it uses less digits than its factorization.

26221045856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 26221045856 in words is "twenty-six billion, two hundred twenty-one million, forty-five thousand, eight hundred fifty-six".