28804526081 has 2 divisors, whose sum is σ = 28804526082. Its totient is φ = 28804526080.

The previous prime is 28804526021. The next prime is 28804526087. The reversal of 28804526081 is 18062540882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15905245456 + 12899280625 = 126116^2 + 113575^2 .

It is a cyclic number.

It is not a de Polignac number, because 28804526081 - 2⁶ = 28804526017 is a prime.

It is a super-2 number, since 2×28804526081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28804526087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14402263040 + 14402263041.

It is an arithmetic number, because the mean of its divisors is an integer number (14402263041).

Almost surely, 2^28804526081 is an apocalyptic number.

It is an amenable number.

28804526081 is a deficient number, since it is larger than the sum of its proper divisors (1).

28804526081 is an equidigital number, since it uses as much as digits as its factorization.

28804526081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245760, while the sum is 44.

The spelling of 28804526081 in words is "twenty-eight billion, eight hundred four million, five hundred twenty-six thousand, eighty-one".