27161049220 has 24 divisors (see below), whose sum is σ = 57049322904. Its totient is φ = 10862301696.

The previous prime is 27161049217. The next prime is 27161049239. The reversal of 27161049220 is 2294016172.

It can be written as a sum of positive squares in 4 ways, for example, as 16511222016 + 10649827204 = 128496^2 + 103198^2 .

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, 25099 + ... + 234418.

It is an arithmetic number, because the mean of its divisors is an integer number (2377055121).

Almost surely, 2^27161049220 is an apocalyptic number.

27161049220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27161049220 is an abundant number, since it is smaller than the sum of its proper divisors (29888273684).

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

27161049220 is a wasteful number, since it uses less digits than its factorization.

27161049220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264759 (or 264757 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 27161049220 in words is "twenty-seven billion, one hundred sixty-one million, forty-nine thousand, two hundred twenty".