26103841781 has 4 divisors (see below), whose sum is σ = 26279035500. Its totient is φ = 25928648064.

The previous prime is 26103841739. The next prime is 26103841811. The reversal of 26103841781 is 18714830162.

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 11017861156 + 15085980625 = 104966^2 + 122825^2 .

It is a cyclic number.

It is not a de Polignac number, because 26103841781 - 2¹⁰ = 26103840757 is a prime.

It is a super-2 number, since 2×26103841781² (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 (26103841721) 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, 87596636 + ... + 87596933.

It is an arithmetic number, because the mean of its divisors is an integer number (6569758875).

Almost surely, 2^26103841781 is an apocalyptic number.

It is an amenable number.

26103841781 is a deficient number, since it is larger than the sum of its proper divisors (175193719).

26103841781 is a wasteful number, since it uses less digits than its factorization.

26103841781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175193718.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 26103841781 in words is "twenty-six billion, one hundred three million, eight hundred forty-one thousand, seven hundred eighty-one".