27725505516 has 18 divisors (see below), whose sum is σ = 70083916812. Its totient is φ = 9241835160.

The previous prime is 27725505473. The next prime is 27725505523. The reversal of 27725505516 is 61550552772.

27725505516 is a `hidden beast` number, since 2 + 77 + 25 + 5 + 0 + 551 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×27725505516² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 385076430 + ... + 385076501.

It is an arithmetic number, because the mean of its divisors is an integer number (3893550934).

Almost surely, 2^27725505516 is an apocalyptic number.

It is an amenable number.

27725505516 is an abundant number, since it is smaller than the sum of its proper divisors (42358411296).

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

27725505516 is a wasteful number, since it uses less digits than its factorization.

27725505516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770152941 (or 770152936 counting only the distinct ones).

The product of its (nonzero) digits is 735000, while the sum is 45.

The spelling of 27725505516 in words is "twenty-seven billion, seven hundred twenty-five million, five hundred five thousand, five hundred sixteen".