26243569729 has 16 divisors (see below), whose sum is σ = 28817452944. Its totient is φ = 23749689600.

The previous prime is 26243569727. The next prime is 26243569739. The reversal of 26243569729 is 92796534262.

It can be written as a sum of positive squares in 8 ways, for example, as 1720009729 + 24523560000 = 41473^2 + 156600^2 .

It is not a de Polignac number, because 26243569729 - 2¹ = 26243569727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26243569729.

It is not an unprimeable number, because it can be changed into a prime (26243569727) 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, 937719 + ... + 965299.

It is an arithmetic number, because the mean of its divisors is an integer number (1801090809).

Almost surely, 2^26243569729 is an apocalyptic number.

It is an amenable number.

26243569729 is a deficient number, since it is larger than the sum of its proper divisors (2573883215).

26243569729 is a wasteful number, since it uses less digits than its factorization.

26243569729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29028.

The product of its digits is 9797760, while the sum is 55.

The spelling of 26243569729 in words is "twenty-six billion, two hundred forty-three million, five hundred sixty-nine thousand, seven hundred twenty-nine".