27205000816 has 20 divisors (see below), whose sum is σ = 60239644912. Its totient is φ = 11659286016.

The previous prime is 27205000811. The next prime is 27205000883. The reversal of 27205000816 is 61800050272.

It is a super-2 number, since 2×27205000816² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27205000811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121450785 + ... + 121451008.

Almost surely, 2^27205000816 is an apocalyptic number.

It is an amenable number.

27205000816 is an abundant number, since it is smaller than the sum of its proper divisors (33034644096).

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

27205000816 is a wasteful number, since it uses less digits than its factorization.

27205000816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242901808 (or 242901802 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 27205000816 in words is "twenty-seven billion, two hundred five million, eight hundred sixteen", and thus it is an aban number.