28817632409 has 2 divisors, whose sum is σ = 28817632410. Its totient is φ = 28817632408.

The previous prime is 28817632387. The next prime is 28817632423. The reversal of 28817632409 is 90423671882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24038952025 + 4778680384 = 155045^2 + 69128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28817632409 is a prime.

It is not a weakly prime, because it can be changed into another prime (28817632429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14408816204 + 14408816205.

It is an arithmetic number, because the mean of its divisors is an integer number (14408816205).

Almost surely, 2^28817632409 is an apocalyptic number.

It is an amenable number.

28817632409 is a deficient number, since it is larger than the sum of its proper divisors (1).

28817632409 is an equidigital number, since it uses as much as digits as its factorization.

28817632409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 28817632409 in words is "twenty-eight billion, eight hundred seventeen million, six hundred thirty-two thousand, four hundred nine".