28100665134 has 24 divisors (see below), whose sum is σ = 64466232480. Its totient is φ = 8815894848.

The previous prime is 28100665069. The next prime is 28100665147. The reversal of 28100665134 is 43156600182.

It is a happy number.

28100665134 is a `hidden beast` number, since 2 + 81 + 0 + 0 + 66 + 513 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45915814 + ... + 45916425.

It is an arithmetic number, because the mean of its divisors is an integer number (2686093020).

Almost surely, 2^28100665134 is an apocalyptic number.

28100665134 is an abundant number, since it is smaller than the sum of its proper divisors (36365567346).

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

28100665134 is a wasteful number, since it uses less digits than its factorization.

28100665134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91832264 (or 91832261 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 28100665134 in words is "twenty-eight billion, one hundred million, six hundred sixty-five thousand, one hundred thirty-four".