28118119669 has 2 divisors, whose sum is σ = 28118119670. Its totient is φ = 28118119668.

The previous prime is 28118119651. The next prime is 28118119693. The reversal of 28118119669 is 96691181182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19673428644 + 8444691025 = 140262^2 + 91895^2 .

It is a cyclic number.

It is not a de Polignac number, because 28118119669 - 2²⁹ = 27581248757 is a prime.

It is a super-2 number, since 2×28118119669² (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 (28118119769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14059059834 + 14059059835.

It is an arithmetic number, because the mean of its divisors is an integer number (14059059835).

Almost surely, 2^28118119669 is an apocalyptic number.

It is an amenable number.

28118119669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28118119669 is an equidigital number, since it uses as much as digits as its factorization.

28118119669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 52.

The spelling of 28118119669 in words is "twenty-eight billion, one hundred eighteen million, one hundred nineteen thousand, six hundred sixty-nine".