28067138117 has 2 divisors, whose sum is σ = 28067138118. Its totient is φ = 28067138116.

The previous prime is 28067138111. The next prime is 28067138131. The reversal of 28067138117 is 71183176082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19305990916 + 8761147201 = 138946^2 + 93601^2 .

It is a cyclic number.

It is not a de Polignac number, because 28067138117 - 2¹⁰ = 28067137093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28067138111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14033569058 + 14033569059.

It is an arithmetic number, because the mean of its divisors is an integer number (14033569059).

Almost surely, 2^28067138117 is an apocalyptic number.

It is an amenable number.

28067138117 is a deficient number, since it is larger than the sum of its proper divisors (1).

28067138117 is an equidigital number, since it uses as much as digits as its factorization.

28067138117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The spelling of 28067138117 in words is "twenty-eight billion, sixty-seven million, one hundred thirty-eight thousand, one hundred seventeen".