26072354581 has 12 divisors (see below), whose sum is σ = 32662071372. Its totient is φ = 20628675648.

The previous prime is 26072354573. The next prime is 26072354587. The reversal of 26072354581 is 18545327062.

It can be written as a sum of positive squares in 2 ways, for example, as 7748400625 + 18323953956 = 88025^2 + 135366^2 .

It is not a de Polignac number, because 26072354581 - 2³ = 26072354573 is a prime.

It is a super-2 number, since 2×26072354581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26072354587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20464320 + ... + 20465593.

It is an arithmetic number, because the mean of its divisors is an integer number (2721839281).

Almost surely, 2^26072354581 is an apocalyptic number.

It is an amenable number.

26072354581 is a deficient number, since it is larger than the sum of its proper divisors (6589716791).

26072354581 is a wasteful number, since it uses less digits than its factorization.

26072354581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40929940 (or 40929933 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 26072354581 in words is "twenty-six billion, seventy-two million, three hundred fifty-four thousand, five hundred eighty-one".