26275650661 has 4 divisors (see below), whose sum is σ = 28296854572. Its totient is φ = 24254446752.

The previous prime is 26275650647. The next prime is 26275650749. The reversal of 26275650661 is 16605657262.

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 11814385636 + 14461265025 = 108694^2 + 120255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26275650661 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 (26275650641) 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 3 ways as a sum of consecutive naturals, for example, 1010601936 + ... + 1010601961.

It is an arithmetic number, because the mean of its divisors is an integer number (7074213643).

Almost surely, 2^26275650661 is an apocalyptic number.

It is an amenable number.

26275650661 is a deficient number, since it is larger than the sum of its proper divisors (2021203911).

26275650661 is a wasteful number, since it uses less digits than its factorization.

26275650661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021203910.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 26275650661 in words is "twenty-six billion, two hundred seventy-five million, six hundred fifty thousand, six hundred sixty-one".