27620645920 has 96 divisors (see below), whose sum is σ = 74614514688. Its totient is φ = 9465013248.

The previous prime is 27620645911. The next prime is 27620645947. The reversal of 27620645920 is 2954602672.

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, 2634609 + ... + 2645071.

It is an arithmetic number, because the mean of its divisors is an integer number (777234528).

Almost surely, 2^27620645920 is an apocalyptic number.

27620645920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27620645920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37307257344).

27620645920 is an abundant number, since it is smaller than the sum of its proper divisors (46993868768).

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

27620645920 is a wasteful number, since it uses less digits than its factorization.

27620645920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12842 (or 12834 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 27620645920 in words is "twenty-seven billion, six hundred twenty million, six hundred forty-five thousand, nine hundred twenty".