26794088721 has 9 divisors (see below), whose sum is σ = 38703281929. Its totient is φ = 17862398436.

The previous prime is 26794088693. The next prime is 26794088731. The reversal of 26794088721 is 12788049762.

It is a happy number.

The square root of 26794088721 is 163689.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 26794088721 - 2⁵ = 26794088689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26794088731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 463786 + ... + 518348.

Almost surely, 2^26794088721 is an apocalyptic number.

26794088721 is the 163689-th square number.

26794088721 is the 81845-th centered octagonal number.

It is an amenable number.

26794088721 is a deficient number, since it is larger than the sum of its proper divisors (11909193208).

26794088721 is an frugal number, since it uses more digits than its factorization.

26794088721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109132 (or 54566 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 26794088721 in words is "twenty-six billion, seven hundred ninety-four million, eighty-eight thousand, seven hundred twenty-one".