28133132566 has 32 divisors (see below), whose sum is σ = 53605317888. Its totient is φ = 10754147040.

The previous prime is 28133132563. The next prime is 28133132593. The reversal of 28133132566 is 66523133182.

It is a super-2 number, since 2×28133132566² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133132561) 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 15 ways as a sum of consecutive naturals, for example, 1715260 + ... + 1731583.

It is an arithmetic number, because the mean of its divisors is an integer number (1675166184).

Almost surely, 2^28133132566 is an apocalyptic number.

28133132566 is a deficient number, since it is larger than the sum of its proper divisors (25472185322).

28133132566 is a wasteful number, since it uses less digits than its factorization.

28133132566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446916.

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

The spelling of 28133132566 in words is "twenty-eight billion, one hundred thirty-three million, one hundred thirty-two thousand, five hundred sixty-six".