28647462817 has 2 divisors, whose sum is σ = 28647462818. Its totient is φ = 28647462816.

The previous prime is 28647462797. The next prime is 28647462901. The reversal of 28647462817 is 71826474682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18013934656 + 10633528161 = 134216^2 + 103119^2 .

It is a cyclic number.

It is not a de Polignac number, because 28647462817 - 2²³ = 28639074209 is a prime.

It is not a weakly prime, because it can be changed into another prime (28647462317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14323731408 + 14323731409.

It is an arithmetic number, because the mean of its divisors is an integer number (14323731409).

Almost surely, 2^28647462817 is an apocalyptic number.

It is an amenable number.

28647462817 is a deficient number, since it is larger than the sum of its proper divisors (1).

28647462817 is an equidigital number, since it uses as much as digits as its factorization.

28647462817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 55.

The spelling of 28647462817 in words is "twenty-eight billion, six hundred forty-seven million, four hundred sixty-two thousand, eight hundred seventeen".