28164441261 has 16 divisors (see below), whose sum is σ = 40969528128. Its totient is φ = 17068080000.

The previous prime is 28164441169. The next prime is 28164441307. The reversal of 28164441261 is 16214446182.

It is not a de Polignac number, because 28164441261 - 2¹⁷ = 28164310189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28164441661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604575 + ... + 649491.

It is an arithmetic number, because the mean of its divisors is an integer number (2560595508).

Almost surely, 2^28164441261 is an apocalyptic number.

It is an amenable number.

28164441261 is a deficient number, since it is larger than the sum of its proper divisors (12805086867).

28164441261 is a wasteful number, since it uses less digits than its factorization.

28164441261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63932.

The product of its digits is 73728, while the sum is 39.

The spelling of 28164441261 in words is "twenty-eight billion, one hundred sixty-four million, four hundred forty-one thousand, two hundred sixty-one".