28668563566134 has 16 divisors (see below), whose sum is σ = 57337584411072. Its totient is φ = 9556111642248.

The previous prime is 28668563566117. The next prime is 28668563566177. The reversal of 28668563566134 is 43166536586682.

It is a happy number.

It is a super-2 number, since 2×28668563566134² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18235564 + ... + 19745199.

It is an arithmetic number, because the mean of its divisors is an integer number (3583599025692).

Almost surely, 2^{28668563566134} is an apocalyptic number.

28668563566134 is an abundant number, since it is smaller than the sum of its proper divisors (28669020844938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28668563566134 is a wasteful number, since it uses less digits than its factorization.

28668563566134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38106571.

The product of its digits is 895795200, while the sum is 69.

The spelling of 28668563566134 in words is "twenty-eight trillion, six hundred sixty-eight billion, five hundred sixty-three million, five hundred sixty-six thousand, one hundred thirty-four".