28561522333 has 12 divisors (see below), whose sum is σ = 30378753972. Its totient is φ = 26847488000.

The previous prime is 28561522331. The next prime is 28561522391. The reversal of 28561522333 is 33322516582.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 700237444 + 27861284889 = 26462^2 + 166917^2 .

It is not a de Polignac number, because 28561522333 - 2¹ = 28561522331 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 (28561522331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168333 + ... + 292333.

It is an arithmetic number, because the mean of its divisors is an integer number (2531562831).

Almost surely, 2^28561522333 is an apocalyptic number.

It is an amenable number.

28561522333 is a deficient number, since it is larger than the sum of its proper divisors (1817231639).

28561522333 is a wasteful number, since it uses less digits than its factorization.

28561522333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124832 (or 124815 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The spelling of 28561522333 in words is "twenty-eight billion, five hundred sixty-one million, five hundred twenty-two thousand, three hundred thirty-three".