28025979911 has 2 divisors, whose sum is σ = 28025979912. Its totient is φ = 28025979910.

The previous prime is 28025979907. The next prime is 28025980043. The reversal of 28025979911 is 11997952082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28025979911 - 2² = 28025979907 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28025976911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14012989955 + 14012989956.

It is an arithmetic number, because the mean of its divisors is an integer number (14012989956).

Almost surely, 2^28025979911 is an apocalyptic number.

28025979911 is a deficient number, since it is larger than the sum of its proper divisors (1).

28025979911 is an equidigital number, since it uses as much as digits as its factorization.

28025979911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 53.

The spelling of 28025979911 in words is "twenty-eight billion, twenty-five million, nine hundred seventy-nine thousand, nine hundred eleven".