26565012461 has 4 divisors (see below), whose sum is σ = 28608474972. Its totient is φ = 24521549952.

The previous prime is 26565012449. The next prime is 26565012473. The reversal of 26565012461 is 16421056562.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (26565012449) and next prime (26565012473).

It can be written as a sum of positive squares in 2 ways, for example, as 5856075625 + 20708936836 = 76525^2 + 143906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26565012461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26565012421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021731236 + ... + 1021731261.

It is an arithmetic number, because the mean of its divisors is an integer number (7152118743).

Almost surely, 2^26565012461 is an apocalyptic number.

It is an amenable number.

26565012461 is a deficient number, since it is larger than the sum of its proper divisors (2043462511).

26565012461 is a wasteful number, since it uses less digits than its factorization.

26565012461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043462510.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 26565012461 in words is "twenty-six billion, five hundred sixty-five million, twelve thousand, four hundred sixty-one".