28133636125 has 16 divisors (see below), whose sum is σ = 40126604544. Its totient is φ = 19291635600.

The previous prime is 28133636099. The next prime is 28133636137. The reversal of 28133636125 is 52163633182.

It is not a de Polignac number, because 28133636125 - 2¹³ = 28133627933 is a prime.

It is a super-2 number, since 2×28133636125² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16075489 + ... + 16077238.

It is an arithmetic number, because the mean of its divisors is an integer number (2507912784).

Almost surely, 2^28133636125 is an apocalyptic number.

28133636125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28133636125 is a deficient number, since it is larger than the sum of its proper divisors (11992968419).

28133636125 is an equidigital number, since it uses as much as digits as its factorization.

28133636125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32152749 (or 32152739 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The spelling of 28133636125 in words is "twenty-eight billion, one hundred thirty-three million, six hundred thirty-six thousand, one hundred twenty-five".