28252472641 has 2 divisors, whose sum is σ = 28252472642. Its totient is φ = 28252472640.

The previous prime is 28252472627. The next prime is 28252472747. The reversal of 28252472641 is 14627425282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22764774400 + 5487698241 = 150880^2 + 74079^2 .

It is a cyclic number.

It is not a de Polignac number, because 28252472641 - 2²⁵ = 28218918209 is a prime.

It is not a weakly prime, because it can be changed into another prime (28252472041) 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, 14126236320 + 14126236321.

It is an arithmetic number, because the mean of its divisors is an integer number (14126236321).

Almost surely, 2^28252472641 is an apocalyptic number.

It is an amenable number.

28252472641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28252472641 is an equidigital number, since it uses as much as digits as its factorization.

28252472641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 430080, while the sum is 43.

The spelling of 28252472641 in words is "twenty-eight billion, two hundred fifty-two million, four hundred seventy-two thousand, six hundred forty-one".