26815051845 has 12 divisors (see below), whose sum is σ = 46479423276. Its totient is φ = 14301360960.

The previous prime is 26815051841. The next prime is 26815051853. The reversal of 26815051845 is 54815051862.

26815051845 is a `hidden beast` number, since 2 + 6 + 81 + 50 + 518 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10858056804 + 15956995041 = 104202^2 + 126321^2 .

It is not a de Polignac number, because 26815051845 - 2² = 26815051841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 595890041 = 26815051845 / (2 + 6 + 8 + 1 + 5 + 0 + 5 + 1 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 26815051845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26815051841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297944976 + ... + 297945065.

It is an arithmetic number, because the mean of its divisors is an integer number (3873285273).

Almost surely, 2^26815051845 is an apocalyptic number.

It is an amenable number.

26815051845 is a deficient number, since it is larger than the sum of its proper divisors (19664371431).

26815051845 is a wasteful number, since it uses less digits than its factorization.

26815051845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595890052 (or 595890049 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 26815051845 in words is "twenty-six billion, eight hundred fifteen million, fifty-one thousand, eight hundred forty-five".