28759168693 has 2 divisors, whose sum is σ = 28759168694. Its totient is φ = 28759168692.

The previous prime is 28759168687. The next prime is 28759168723. The reversal of 28759168693 is 39686195782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26168562289 + 2590606404 = 161767^2 + 50898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28759168693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28759168663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14379584346 + 14379584347.

It is an arithmetic number, because the mean of its divisors is an integer number (14379584347).

Almost surely, 2^28759168693 is an apocalyptic number.

It is an amenable number.

28759168693 is a deficient number, since it is larger than the sum of its proper divisors (1).

28759168693 is an equidigital number, since it uses as much as digits as its factorization.

28759168693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39191040, while the sum is 64.

The spelling of 28759168693 in words is "twenty-eight billion, seven hundred fifty-nine million, one hundred sixty-eight thousand, six hundred ninety-three".