28533336525 has 72 divisors (see below), whose sum is σ = 51859716480. Its totient is φ = 14994270720.

The previous prime is 28533336521. The next prime is 28533336577. The reversal of 28533336525 is 52563333582.

It is a happy number.

28533336525 is a `hidden beast` number, since 2 + 8 + 533 + 33 + 65 + 25 = 666.

It is not a de Polignac number, because 28533336525 - 2² = 28533336521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28533336521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10539222 + ... + 10541928.

It is an arithmetic number, because the mean of its divisors is an integer number (720273840).

Almost surely, 2^28533336525 is an apocalyptic number.

28533336525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28533336525 is a deficient number, since it is larger than the sum of its proper divisors (23326379955).

28533336525 is a wasteful number, since it uses less digits than its factorization.

28533336525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395 (or 3387 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 45.

The spelling of 28533336525 in words is "twenty-eight billion, five hundred thirty-three million, three hundred thirty-six thousand, five hundred twenty-five".