26442640338 has 16 divisors (see below), whose sum is σ = 54591257856. Its totient is φ = 8529883920.

The previous prime is 26442640333. The next prime is 26442640339. The reversal of 26442640338 is 83304624462.

It is a self number, because there is not a number n which added to its sum of digits gives 26442640338.

It is not an unprimeable number, because it can be changed into a prime (26442640331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71082181 + ... + 71082552.

It is an arithmetic number, because the mean of its divisors is an integer number (3411953616).

Almost surely, 2^26442640338 is an apocalyptic number.

26442640338 is an abundant number, since it is smaller than the sum of its proper divisors (28148617518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26442640338 is a wasteful number, since it uses less digits than its factorization.

26442640338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142164769.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 26442640338 in words is "twenty-six billion, four hundred forty-two million, six hundred forty thousand, three hundred thirty-eight".