26405250738 has 16 divisors (see below), whose sum is σ = 52814218080. Its totient is φ = 8801130816.

The previous prime is 26405250737. The next prime is 26405250791. The reversal of 26405250738 is 83705250462.

26405250738 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×26405250738³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26405250738.

It is not an unprimeable number, because it can be changed into a prime (26405250737) 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, 57820 + ... + 236967.

It is an arithmetic number, because the mean of its divisors is an integer number (3300888630).

Almost surely, 2^26405250738 is an apocalyptic number.

26405250738 is an abundant number, since it is smaller than the sum of its proper divisors (26408967342).

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

26405250738 is a wasteful number, since it uses less digits than its factorization.

26405250738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309721.

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 26405250738 in words is "twenty-six billion, four hundred five million, two hundred fifty thousand, seven hundred thirty-eight".