28043186497 has 2 divisors, whose sum is σ = 28043186498. Its totient is φ = 28043186496.

The previous prime is 28043186453. The next prime is 28043186527. The reversal of 28043186497 is 79468134082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26770195456 + 1272991041 = 163616^2 + 35679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28043186497 is a prime.

It is not a weakly prime, because it can be changed into another prime (28043186797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14021593248 + 14021593249.

It is an arithmetic number, because the mean of its divisors is an integer number (14021593249).

Almost surely, 2^28043186497 is an apocalyptic number.

It is an amenable number.

28043186497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28043186497 is an equidigital number, since it uses as much as digits as its factorization.

28043186497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 28043186497 in words is "twenty-eight billion, forty-three million, one hundred eighty-six thousand, four hundred ninety-seven".