12305647272 has 64 divisors (see below), whose sum is σ = 31467372480. Its totient is φ = 4008722432.

The previous prime is 12305647267. The next prime is 12305647297. The reversal of 12305647272 is 27274650321.

It is a self number, because there is not a number n which added to its sum of digits gives 12305647272.

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, 308083 + ... + 345725.

It is an arithmetic number, because the mean of its divisors is an integer number (491677695).

Almost surely, 2^12305647272 is an apocalyptic number.

12305647272 is a gapful number since it is divisible by the number (12) 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 12305647272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15733686240).

12305647272 is an abundant number, since it is smaller than the sum of its proper divisors (19161725208).

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

12305647272 is a wasteful number, since it uses less digits than its factorization.

12305647272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37962 (or 37958 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The spelling of 12305647272 in words is "twelve billion, three hundred five million, six hundred forty-seven thousand, two hundred seventy-two".