12720635593540 has 96 divisors (see below), whose sum is σ = 30820877144064. Its totient is φ = 4319923708800.

The previous prime is 12720635593499. The next prime is 12720635593559. The reversal of 12720635593540 is 4539553602721.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5655265 + ... + 7577815.

It is an arithmetic number, because the mean of its divisors is an integer number (321050803584).

Almost surely, 2^{12720635593540} is an apocalyptic number.

12720635593540 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 12720635593540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15410438572032).

12720635593540 is an abundant number, since it is smaller than the sum of its proper divisors (18100241550524).

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

12720635593540 is a wasteful number, since it uses less digits than its factorization.

12720635593540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923017 (or 1923015 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 12720635593540 in words is "twelve trillion, seven hundred twenty billion, six hundred thirty-five million, five hundred ninety-three thousand, five hundred forty".