28759168705 has 4 divisors (see below), whose sum is σ = 34511002452. Its totient is φ = 23007334960.

The previous prime is 28759168693. The next prime is 28759168723. The reversal of 28759168705 is 50786195782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7094861361 + 21664307344 = 84231^2 + 147188^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28759168705 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28759168705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2875916866 + ... + 2875916875.

It is an arithmetic number, because the mean of its divisors is an integer number (8627750613).

Almost surely, 2^28759168705 is an apocalyptic number.

It is an amenable number.

28759168705 is a deficient number, since it is larger than the sum of its proper divisors (5751833747).

28759168705 is an equidigital number, since it uses as much as digits as its factorization.

28759168705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751833746.

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 28759168705 in words is "twenty-eight billion, seven hundred fifty-nine million, one hundred sixty-eight thousand, seven hundred five".