28197759911 has 2 divisors, whose sum is σ = 28197759912. Its totient is φ = 28197759910.

The previous prime is 28197759883. The next prime is 28197759943. The reversal of 28197759911 is 11995779182.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28197759911 is a prime.

It is a super-2 number, since 2×28197759911² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28197759511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14098879955 + 14098879956.

It is an arithmetic number, because the mean of its divisors is an integer number (14098879956).

Almost surely, 2^28197759911 is an apocalyptic number.

28197759911 is a deficient number, since it is larger than the sum of its proper divisors (1).

28197759911 is an equidigital number, since it uses as much as digits as its factorization.

28197759911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 59.

The spelling of 28197759911 in words is "twenty-eight billion, one hundred ninety-seven million, seven hundred fifty-nine thousand, nine hundred eleven".