28875565637 has 2 divisors, whose sum is σ = 28875565638. Its totient is φ = 28875565636.

The previous prime is 28875565633. The next prime is 28875565651. The reversal of 28875565637 is 73656557882.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28862272321 + 13293316 = 169889^2 + 3646^2 .

It is a cyclic number.

It is not a de Polignac number, because 28875565637 - 2² = 28875565633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28875565637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28875565633) 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 as a sum of consecutive naturals, namely, 14437782818 + 14437782819.

It is an arithmetic number, because the mean of its divisors is an integer number (14437782819).

Almost surely, 2^28875565637 is an apocalyptic number.

It is an amenable number.

28875565637 is a deficient number, since it is larger than the sum of its proper divisors (1).

28875565637 is an equidigital number, since it uses as much as digits as its factorization.

28875565637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672000, while the sum is 62.

The spelling of 28875565637 in words is "twenty-eight billion, eight hundred seventy-five million, five hundred sixty-five thousand, six hundred thirty-seven".