12566173325620 has 48 divisors (see below), whose sum is σ = 26645671301760. Its totient is φ = 4977796486784.

The previous prime is 12566173325599. The next prime is 12566173325623. The reversal of 12566173325620 is 2652337166521.

It is a happy number.

It is a super-2 number, since 2×12566173325620² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566173325623) 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, 6094714 + ... + 7891633.

It is an arithmetic number, because the mean of its divisors is an integer number (555118152120).

Almost surely, 2^{12566173325620} is an apocalyptic number.

12566173325620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12566173325620 is an abundant number, since it is smaller than the sum of its proper divisors (14079497976140).

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

12566173325620 is a wasteful number, since it uses less digits than its factorization.

12566173325620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13986792 (or 13986790 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 12566173325620 in words is "twelve trillion, five hundred sixty-six billion, one hundred seventy-three million, three hundred twenty-five thousand, six hundred twenty".