26306875138777 has 4 divisors (see below), whose sum is σ = 26323184424420. Its totient is φ = 26290565853136.

The previous prime is 26306875138673. The next prime is 26306875138783. The reversal of 26306875138777 is 77783157860362.

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 11182095233296 + 15124779905481 = 3343964^2 + 3889059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26306875138777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26306875138477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8154640402 + ... + 8154643627.

It is an arithmetic number, because the mean of its divisors is an integer number (6580796106105).

Almost surely, 2^{26306875138777} is an apocalyptic number.

It is an amenable number.

26306875138777 is a deficient number, since it is larger than the sum of its proper divisors (16309285643).

26306875138777 is a wasteful number, since it uses less digits than its factorization.

26306875138777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16309285642.

The product of its (nonzero) digits is 497871360, while the sum is 70.

The spelling of 26306875138777 in words is "twenty-six trillion, three hundred six billion, eight hundred seventy-five million, one hundred thirty-eight thousand, seven hundred seventy-seven".