28915197911 has 2 divisors, whose sum is σ = 28915197912. Its totient is φ = 28915197910.

The previous prime is 28915197907. The next prime is 28915197929. The reversal of 28915197911 is 11979151982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28915197911 - 2² = 28915197907 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28915197991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14457598955 + 14457598956.

It is an arithmetic number, because the mean of its divisors is an integer number (14457598956).

Almost surely, 2^28915197911 is an apocalyptic number.

28915197911 is a deficient number, since it is larger than the sum of its proper divisors (1).

28915197911 is an equidigital number, since it uses as much as digits as its factorization.

28915197911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 53.

The spelling of 28915197911 in words is "twenty-eight billion, nine hundred fifteen million, one hundred ninety-seven thousand, nine hundred eleven".