28481596549 has 16 divisors (see below), whose sum is σ = 33676369920. Its totient is φ = 23571877680.

The previous prime is 28481596531. The next prime is 28481596553. The reversal of 28481596549 is 94569518482.

It is a cyclic number.

It is not a de Polignac number, because 28481596549 - 2²¹ = 28479499397 is a prime.

It is a super-2 number, since 2×28481596549² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28481596519) 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, 52009 + ... + 244270.

It is an arithmetic number, because the mean of its divisors is an integer number (2104773120).

Almost surely, 2^28481596549 is an apocalyptic number.

It is an amenable number.

28481596549 is a deficient number, since it is larger than the sum of its proper divisors (5194773371).

28481596549 is a wasteful number, since it uses less digits than its factorization.

28481596549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296760.

The product of its digits is 24883200, while the sum is 61.

The spelling of 28481596549 in words is "twenty-eight billion, four hundred eighty-one million, five hundred ninety-six thousand, five hundred forty-nine".