27851379920 has 80 divisors (see below), whose sum is σ = 79697815680. Its totient is φ = 8814500352.

The previous prime is 27851379877. The next prime is 27851379943. The reversal of 27851379920 is 2997315872.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1905590 + ... + 1920149.

It is an arithmetic number, because the mean of its divisors is an integer number (996222696).

Almost surely, 2^27851379920 is an apocalyptic number.

27851379920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27851379920 is an abundant number, since it is smaller than the sum of its proper divisors (51846435760).

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

27851379920 is a wasteful number, since it uses less digits than its factorization.

27851379920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825772 (or 3825766 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 27851379920 in words is "twenty-seven billion, eight hundred fifty-one million, three hundred seventy-nine thousand, nine hundred twenty".