12562661066520 has 128 divisors (see below), whose sum is σ = 38039181120000. Its totient is φ = 3318923406336.

The previous prime is 12562661066519. The next prime is 12562661066573. The reversal of 12562661066520 is 2566016626521.

It is a self number, because there is not a number n which added to its sum of digits gives 12562661066520.

It is a congruent number.

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, 7437877 + ... + 8969243.

It is an arithmetic number, because the mean of its divisors is an integer number (297181102500).

Almost surely, 2^{12562661066520} is an apocalyptic number.

12562661066520 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 12562661066520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19019590560000).

12562661066520 is an abundant number, since it is smaller than the sum of its proper divisors (25476520053480).

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

12562661066520 is a wasteful number, since it uses less digits than its factorization.

12562661066520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532017 (or 1532013 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 12562661066520 in words is "twelve trillion, five hundred sixty-two billion, six hundred sixty-one million, sixty-six thousand, five hundred twenty".