27726867620 has 12 divisors (see below), whose sum is σ = 58226422044. Its totient is φ = 11090747040.

The previous prime is 27726867617. The next prime is 27726867647. The reversal of 27726867620 is 2676862772.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18795861604 + 8931006016 = 137098^2 + 94504^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693171671 + ... + 693171710.

It is an arithmetic number, because the mean of its divisors is an integer number (4852201837).

Almost surely, 2^27726867620 is an apocalyptic number.

27726867620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27726867620 is an abundant number, since it is smaller than the sum of its proper divisors (30499554424).

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

27726867620 is a wasteful number, since it uses less digits than its factorization.

27726867620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386343390 (or 1386343388 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 53.

The spelling of 27726867620 in words is "twenty-seven billion, seven hundred twenty-six million, eight hundred sixty-seven thousand, six hundred twenty".