28265941549 has 2 divisors, whose sum is σ = 28265941550. Its totient is φ = 28265941548.

The previous prime is 28265941547. The next prime is 28265941553. The reversal of 28265941549 is 94514956282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19657442025 + 8608499524 = 140205^2 + 92782^2 .

It is a cyclic number.

It is not a de Polignac number, because 28265941549 - 2¹ = 28265941547 is a prime.

Together with 28265941547, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28265941549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28265941541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14132970774 + 14132970775.

It is an arithmetic number, because the mean of its divisors is an integer number (14132970775).

Almost surely, 2^28265941549 is an apocalyptic number.

It is an amenable number.

28265941549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28265941549 is an equidigital number, since it uses as much as digits as its factorization.

28265941549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 55.

The spelling of 28265941549 in words is "twenty-eight billion, two hundred sixty-five million, nine hundred forty-one thousand, five hundred forty-nine".