12305732520280 has 128 divisors (see below), whose sum is σ = 29728216425600. Its totient is φ = 4567743332352.

The previous prime is 12305732520271. The next prime is 12305732520283. The reversal of 12305732520280 is 8202523750321.

It is a super-2 number, since 2×12305732520280² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12305732520283) by changing a digit.

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, 152801304 + ... + 152881816.

It is an arithmetic number, because the mean of its divisors is an integer number (232251690825).

Almost surely, 2^{12305732520280} is an apocalyptic number.

12305732520280 is a gapful number since it is divisible by the number (10) 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 12305732520280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14864108212800).

12305732520280 is an abundant number, since it is smaller than the sum of its proper divisors (17422483905320).

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

12305732520280 is a wasteful number, since it uses less digits than its factorization.

12305732520280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83693 (or 83689 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 12305732520280 in words is "twelve trillion, three hundred five billion, seven hundred thirty-two million, five hundred twenty thousand, two hundred eighty".