28018532459 has 2 divisors, whose sum is σ = 28018532460. Its totient is φ = 28018532458.

The previous prime is 28018532453. The next prime is 28018532467. The reversal of 28018532459 is 95423581082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28018532459 is a prime.

It is a super-2 number, since 2×28018532459² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28018532453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14009266229 + 14009266230.

It is an arithmetic number, because the mean of its divisors is an integer number (14009266230).

Almost surely, 2^28018532459 is an apocalyptic number.

28018532459 is a deficient number, since it is larger than the sum of its proper divisors (1).

28018532459 is an equidigital number, since it uses as much as digits as its factorization.

28018532459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 28018532459 in words is "twenty-eight billion, eighteen million, five hundred thirty-two thousand, four hundred fifty-nine".