26854878145 has 4 divisors (see below), whose sum is σ = 32225853780. Its totient is φ = 21483902512.

The previous prime is 26854878079. The next prime is 26854878163. The reversal of 26854878145 is 54187845862.

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 7520531841 + 19334346304 = 86721^2 + 139048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26854878145 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 26854878145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2685487810 + ... + 2685487819.

It is an arithmetic number, because the mean of its divisors is an integer number (8056463445).

Almost surely, 2^26854878145 is an apocalyptic number.

It is an amenable number.

26854878145 is a deficient number, since it is larger than the sum of its proper divisors (5370975635).

26854878145 is an equidigital number, since it uses as much as digits as its factorization.

26854878145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370975634.

The product of its digits is 17203200, while the sum is 58.

The spelling of 26854878145 in words is "twenty-six billion, eight hundred fifty-four million, eight hundred seventy-eight thousand, one hundred forty-five".