26090360881 has 16 divisors (see below), whose sum is σ = 28502301520. Its totient is φ = 23738572800.

The previous prime is 26090360873. The next prime is 26090360917. The reversal of 26090360881 is 18806309062.

26090360881 = 114215² + 114216².

It can be written as a sum of positive squares in 8 ways, for example, as 5118687025 + 20971673856 = 71545^2 + 144816^2 .

It is a 7-Lehmer number, since φ(26090360881) divides (26090360881-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 26090360881 - 2³ = 26090360873 is a prime.

It is a super-2 number, since 2×26090360881² (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 (26090360801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225781 + ... + 321181.

It is an arithmetic number, because the mean of its divisors is an integer number (1781393845).

Almost surely, 2^26090360881 is an apocalyptic number.

26090360881 is the 114216-th centered square number.

It is an amenable number.

26090360881 is a deficient number, since it is larger than the sum of its proper divisors (2411940639).

26090360881 is a wasteful number, since it uses less digits than its factorization.

26090360881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95716.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 26090360881 in words is "twenty-six billion, ninety million, three hundred sixty thousand, eight hundred eighty-one".