26485378281 has 6 divisors (see below), whose sum is σ = 38256657530. Its totient is φ = 17656918848.

The previous prime is 26485378267. The next prime is 26485378313. The reversal of 26485378281 is 18287358462.

26485378281 is a `hidden beast` number, since 2 + 6 + 485 + 3 + 7 + 82 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25664040000 + 821338281 = 160200^2 + 28659^2 .

It is not a de Polignac number, because 26485378281 - 2⁶ = 26485378217 is a prime.

It is a super-2 number, since 2×26485378281² (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 (26485378261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1471409896 + ... + 1471409913.

Almost surely, 2^26485378281 is an apocalyptic number.

It is an amenable number.

26485378281 is a deficient number, since it is larger than the sum of its proper divisors (11771279249).

26485378281 is a wasteful number, since it uses less digits than its factorization.

26485378281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2942819815 (or 2942819812 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 26485378281 in words is "twenty-six billion, four hundred eighty-five million, three hundred seventy-eight thousand, two hundred eighty-one".