26189822978 has 54 divisors (see below), whose sum is σ = 44040039561. Its totient is φ = 11672166000.

The previous prime is 26189822933. The next prime is 26189822983. The reversal of 26189822978 is 87922898162.

It can be written as a sum of positive squares in 2 ways, for example, as 18178319929 + 8011503049 = 134827^2 + 89507^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=114433.

It is a Duffinian number.

Its product of digits (13934592) is a multiple of the sum of its prime factors (432).

It is a self number, because there is not a number n which added to its sum of digits gives 26189822978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 254270075 + ... + 254270177.

Almost surely, 2^26189822978 is an apocalyptic number.

26189822978 is a deficient number, since it is larger than the sum of its proper divisors (17850216583).

26189822978 is a wasteful number, since it uses less digits than its factorization.

26189822978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 217 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 62.

The spelling of 26189822978 in words is "twenty-six billion, one hundred eighty-nine million, eight hundred twenty-two thousand, nine hundred seventy-eight".