12645359265620 has 72 divisors (see below), whose sum is σ = 28632531618432. Its totient is φ = 4682152495680.

The previous prime is 12645359265571. The next prime is 12645359265629. The reversal of 12645359265620 is 2656295354621.

It is a happy number.

It is a super-2 number, since 2×12645359265620² (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 (12645359265629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13860704 + ... + 14744823.

It is an arithmetic number, because the mean of its divisors is an integer number (397674050256).

Almost surely, 2^{12645359265620} is an apocalyptic number.

12645359265620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12645359265620 is an abundant number, since it is smaller than the sum of its proper divisors (15987172352812).

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

12645359265620 is a wasteful number, since it uses less digits than its factorization.

12645359265620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28605621 (or 28605588 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 56.

The spelling of 12645359265620 in words is "twelve trillion, six hundred forty-five billion, three hundred fifty-nine million, two hundred sixty-five thousand, six hundred twenty".