28112342177 has 2 divisors, whose sum is σ = 28112342178. Its totient is φ = 28112342176.

The previous prime is 28112342171. The next prime is 28112342231. The reversal of 28112342177 is 77124321182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16257270016 + 11855072161 = 127504^2 + 108881^2 .

It is a cyclic number.

It is not a de Polignac number, because 28112342177 - 2²⁴ = 28095564961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28112342177.

It is not a weakly prime, because it can be changed into another prime (28112342171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14056171088 + 14056171089.

It is an arithmetic number, because the mean of its divisors is an integer number (14056171089).

Almost surely, 2^28112342177 is an apocalyptic number.

It is an amenable number.

28112342177 is a deficient number, since it is larger than the sum of its proper divisors (1).

28112342177 is an equidigital number, since it uses as much as digits as its factorization.

28112342177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The spelling of 28112342177 in words is "twenty-eight billion, one hundred twelve million, three hundred forty-two thousand, one hundred seventy-seven".