12640062165556 has 48 divisors (see below), whose sum is σ = 25524741658752. Its totient is φ = 5364784656000.

The previous prime is 12640062165457. The next prime is 12640062165557. The reversal of 12640062165556 is 65556126004621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640062165557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8481606 + ... + 9859906.

It is an arithmetic number, because the mean of its divisors is an integer number (531765451224).

Almost surely, 2^{12640062165556} is an apocalyptic number.

It is an amenable number.

12640062165556 is an abundant number, since it is smaller than the sum of its proper divisors (12884679493196).

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

12640062165556 is a wasteful number, since it uses less digits than its factorization.

12640062165556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381480 (or 1381478 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 12640062165556 in words is "twelve trillion, six hundred forty billion, sixty-two million, one hundred sixty-five thousand, five hundred fifty-six".