26276047781 has 4 divisors (see below), whose sum is σ = 26323222572. Its totient is φ = 26228872992.

The previous prime is 26276047771. The next prime is 26276047783. The reversal of 26276047781 is 18774067262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3915630625 + 22360417156 = 62575^2 + 149534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26276047781 is a prime.

It is a super-2 number, since 2×26276047781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26276047783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23586560 + ... + 23587673.

It is an arithmetic number, because the mean of its divisors is an integer number (6580805643).

Almost surely, 2^26276047781 is an apocalyptic number.

It is an amenable number.

26276047781 is a deficient number, since it is larger than the sum of its proper divisors (47174791).

26276047781 is an equidigital number, since it uses as much as digits as its factorization.

26276047781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47174790.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 26276047781 in words is "twenty-six billion, two hundred seventy-six million, forty-seven thousand, seven hundred eighty-one".