12709558538240 has 104 divisors (see below), whose sum is σ = 31243102393608. Its totient is φ = 4959827394560.

The previous prime is 12709558538233. The next prime is 12709558538263. The reversal of 12709558538240 is 4283585590721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 429748424704 + 12279810113536 = 655552^2 + 3504256^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12709558538240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6728417 + ... + 8407776.

Almost surely, 2^{12709558538240} is an apocalyptic number.

12709558538240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12709558538240 is an abundant number, since it is smaller than the sum of its proper divisors (18533543855368).

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

12709558538240 is an equidigital number, since it uses as much as digits as its factorization.

12709558538240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15136263 (or 15136241 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 59.

The spelling of 12709558538240 in words is "twelve trillion, seven hundred nine billion, five hundred fifty-eight million, five hundred thirty-eight thousand, two hundred forty".