26894442081 has 32 divisors (see below), whose sum is σ = 39705705088. Its totient is φ = 16085122560.

The previous prime is 26894442077. The next prime is 26894442151. The reversal of 26894442081 is 18024449862.

It is a happy number.

It is not a de Polignac number, because 26894442081 - 2² = 26894442077 is a prime.

It is a super-2 number, since 2×26894442081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26894442081.

It is not an unprimeable number, because it can be changed into a prime (26894444081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1342146 + ... + 1362036.

It is an arithmetic number, because the mean of its divisors is an integer number (1240803284).

Almost surely, 2^26894442081 is an apocalyptic number.

It is an amenable number.

26894442081 is a deficient number, since it is larger than the sum of its proper divisors (12811263007).

26894442081 is a wasteful number, since it uses less digits than its factorization.

26894442081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20881.

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 26894442081 in words is "twenty-six billion, eight hundred ninety-four million, four hundred forty-two thousand, eighty-one".