28409595497 has 2 divisors, whose sum is σ = 28409595498. Its totient is φ = 28409595496.

The previous prime is 28409595491. The next prime is 28409595551. The reversal of 28409595497 is 79459590482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18269306896 + 10140288601 = 135164^2 + 100699^2 .

It is a cyclic number.

It is not a de Polignac number, because 28409595497 - 2⁶ = 28409595433 is a prime.

It is not a weakly prime, because it can be changed into another prime (28409595491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14204797748 + 14204797749.

It is an arithmetic number, because the mean of its divisors is an integer number (14204797749).

Almost surely, 2^28409595497 is an apocalyptic number.

It is an amenable number.

28409595497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28409595497 is an equidigital number, since it uses as much as digits as its factorization.

28409595497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 28409595497 in words is "twenty-eight billion, four hundred nine million, five hundred ninety-five thousand, four hundred ninety-seven".