27747708720 has 160 divisors (see below), whose sum is σ = 91326958272. Its totient is φ = 6945079296.

The previous prime is 27747708719. The next prime is 27747708739. The reversal of 27747708720 is 2780774772.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1512724 + ... + 1530956.

Almost surely, 2^27747708720 is an apocalyptic number.

27747708720 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 27747708720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45663479136).

27747708720 is an abundant number, since it is smaller than the sum of its proper divisors (63579249552).

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

27747708720 is a wasteful number, since it uses less digits than its factorization.

27747708720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18639 (or 18633 counting only the distinct ones).

The product of its (nonzero) digits is 2151296, while the sum is 51.

The spelling of 27747708720 in words is "twenty-seven billion, seven hundred forty-seven million, seven hundred eight thousand, seven hundred twenty".