28768732897 has 2 divisors, whose sum is σ = 28768732898. Its totient is φ = 28768732896.

The previous prime is 28768732843. The next prime is 28768732901. The reversal of 28768732897 is 79823786782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15449495616 + 13319237281 = 124296^2 + 115409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28768732897 is a prime.

It is not a weakly prime, because it can be changed into another prime (28768732297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14384366448 + 14384366449.

It is an arithmetic number, because the mean of its divisors is an integer number (14384366449).

Almost surely, 2^28768732897 is an apocalyptic number.

It is an amenable number.

28768732897 is a deficient number, since it is larger than the sum of its proper divisors (1).

28768732897 is an equidigital number, since it uses as much as digits as its factorization.

28768732897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113799168, while the sum is 67.

The spelling of 28768732897 in words is "twenty-eight billion, seven hundred sixty-eight million, seven hundred thirty-two thousand, eight hundred ninety-seven".