12644056604500 has 96 divisors (see below), whose sum is σ = 29518067464704. Its totient is φ = 4719732512000.

The previous prime is 12644056604461. The next prime is 12644056604507. The reversal of 12644056604500 is 540665044621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644056604507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12936832 + ... + 13879831.

It is an arithmetic number, because the mean of its divisors is an integer number (307479869424).

Almost surely, 2^{12644056604500} is an apocalyptic number.

12644056604500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12644056604500 is an abundant number, since it is smaller than the sum of its proper divisors (16874010860204).

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

12644056604500 is a wasteful number, since it uses less digits than its factorization.

12644056604500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26816746 (or 26816734 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 12644056604500 in words is "twelve trillion, six hundred forty-four billion, fifty-six million, six hundred four thousand, five hundred".