27774980920 has 32 divisors (see below), whose sum is σ = 64182729600. Its totient is φ = 10809721728.

The previous prime is 27774980903. The next prime is 27774980939. The reversal of 27774980920 is 2908947772.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9381960 + ... + 9384919.

It is an arithmetic number, because the mean of its divisors is an integer number (2005710300).

Almost surely, 2^27774980920 is an apocalyptic number.

27774980920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27774980920 is an abundant number, since it is smaller than the sum of its proper divisors (36407748680).

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

27774980920 is a wasteful number, since it uses less digits than its factorization.

27774980920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18766927 (or 18766923 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 27774980920 in words is "twenty-seven billion, seven hundred seventy-four million, nine hundred eighty thousand, nine hundred twenty".