26221726705 has 16 divisors (see below), whose sum is σ = 31819294800. Its totient is φ = 20743094272.

The previous prime is 26221726693. The next prime is 26221726711. The reversal of 26221726705 is 50762712262.

It can be written as a sum of positive squares in 8 ways, for example, as 7233162304 + 18988564401 = 85048^2 + 137799^2 .

It is a cyclic number.

It is not a de Polignac number, because 26221726705 - 2⁷ = 26221726577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101571 + ... + 250519.

It is an arithmetic number, because the mean of its divisors is an integer number (1988705925).

Almost surely, 2^26221726705 is an apocalyptic number.

It is an amenable number.

26221726705 is a deficient number, since it is larger than the sum of its proper divisors (5597568095).

26221726705 is a wasteful number, since it uses less digits than its factorization.

26221726705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149348.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 26221726705 in words is "twenty-six billion, two hundred twenty-one million, seven hundred twenty-six thousand, seven hundred five".