26898952081 has 9 divisors (see below), whose sum is σ = 27032292273. Its totient is φ = 26766268800.

The previous prime is 26898952057. The next prime is 26898952109. The reversal of 26898952081 is 18025989862.

The square root of 26898952081 is 164009.

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

It can be written as a sum of positive squares in 4 ways, for example, as 22864161681 + 4034790400 = 151209^2 + 63520^2 .

It is not a de Polignac number, because 26898952081 - 2⁷ = 26898951953 is a prime.

It is a super-2 number, since 2×26898952081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26898952051) 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, 65767405 + ... + 65767813.

Almost surely, 2^26898952081 is an apocalyptic number.

26898952081 is the 164009-th square number.

26898952081 is the 82005-th centered octagonal number.

It is an amenable number.

26898952081 is a deficient number, since it is larger than the sum of its proper divisors (133340192).

26898952081 is an frugal number, since it uses more digits than its factorization.

26898952081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 58.

The spelling of 26898952081 in words is "twenty-six billion, eight hundred ninety-eight million, nine hundred fifty-two thousand, eighty-one".