12525450666320 has 20 divisors (see below), whose sum is σ = 29121672799380. Its totient is φ = 5010180266496.

The previous prime is 12525450666319. The next prime is 12525450666349. The reversal of 12525450666320 is 2366605452521.

It can be written as a sum of positive squares in 2 ways, for example, as 9383169734416 + 3142280931904 = 3063196^2 + 1772648^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×12525450666320² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78284066585 + ... + 78284066744.

It is an arithmetic number, because the mean of its divisors is an integer number (1456083639969).

Almost surely, 2^{12525450666320} is an apocalyptic number.

12525450666320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12525450666320 is an abundant number, since it is smaller than the sum of its proper divisors (16596222133060).

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

12525450666320 is a wasteful number, since it uses less digits than its factorization.

12525450666320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156568133342 (or 156568133336 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 12525450666320 in words is "twelve trillion, five hundred twenty-five billion, four hundred fifty million, six hundred sixty-six thousand, three hundred twenty".