28336656261 has 16 divisors (see below), whose sum is σ = 40091502528. Its totient is φ = 17741280000.

The previous prime is 28336656191. The next prime is 28336656281. The reversal of 28336656261 is 16265663382.

It is not a de Polignac number, because 28336656261 - 2²⁵ = 28303101829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28336656261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28336656281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579115 + ... + 626136.

It is an arithmetic number, because the mean of its divisors is an integer number (2505718908).

Almost surely, 2^28336656261 is an apocalyptic number.

It is an amenable number.

28336656261 is a deficient number, since it is larger than the sum of its proper divisors (11754846267).

28336656261 is a wasteful number, since it uses less digits than its factorization.

28336656261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205732.

The product of its digits is 1866240, while the sum is 48.

The spelling of 28336656261 in words is "twenty-eight billion, three hundred thirty-six million, six hundred fifty-six thousand, two hundred sixty-one".