27917225728 has 54 divisors (see below), whose sum is σ = 63702310616. Its totient is φ = 11961494016.

The previous prime is 27917225723. The next prime is 27917225849. The reversal of 27917225728 is 82752271972.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27917225723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7071051 + ... + 7074997.

Almost surely, 2^27917225728 is an apocalyptic number.

27917225728 is a gapful number since it is divisible by the number (28) 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 27917225728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31851155308).

27917225728 is an abundant number, since it is smaller than the sum of its proper divisors (35785084888).

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

27917225728 is an frugal number, since it uses more digits than its factorization.

27917225728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7917 (or 3956 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 52.

The spelling of 27917225728 in words is "twenty-seven billion, nine hundred seventeen million, two hundred twenty-five thousand, seven hundred twenty-eight".