27938721225516 has 24 divisors (see below), whose sum is σ = 65286642528240. Its totient is φ = 9299150932032.

The previous prime is 27938721225419. The next prime is 27938721225643. The reversal of 27938721225516 is 61552212783972.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27938721225516.

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, 1719509431 + ... + 1719525678.

It is an arithmetic number, because the mean of its divisors is an integer number (2720276772010).

Almost surely, 2^{27938721225516} is an apocalyptic number.

It is an amenable number.

27938721225516 is an abundant number, since it is smaller than the sum of its proper divisors (37347921302724).

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

27938721225516 is a wasteful number, since it uses less digits than its factorization.

27938721225516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439035793 (or 3439035791 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 60.

The spelling of 27938721225516 in words is "twenty-seven trillion, nine hundred thirty-eight billion, seven hundred twenty-one million, two hundred twenty-five thousand, five hundred sixteen".