28081634279 has 2 divisors, whose sum is σ = 28081634280. Its totient is φ = 28081634278.

The previous prime is 28081634209. The next prime is 28081634303. The reversal of 28081634279 is 97243618082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28081634279 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28081634209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040817139 + 14040817140.

It is an arithmetic number, because the mean of its divisors is an integer number (14040817140).

Almost surely, 2^28081634279 is an apocalyptic number.

28081634279 is a deficient number, since it is larger than the sum of its proper divisors (1).

28081634279 is an equidigital number, since it uses as much as digits as its factorization.

28081634279 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 28081634279 in words is "twenty-eight billion, eighty-one million, six hundred thirty-four thousand, two hundred seventy-nine".