12501052523640 has 256 divisors, whose sum is σ = 41828203267200. Its totient is φ = 3320985305088.

The previous prime is 12501052523639. The next prime is 12501052523689. The reversal of 12501052523640 is 4632525010521.

12501052523640 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 1 + 0 + 5 + 2 + 5 + 2 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12501052523595 and 12501052523604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 580974162 + ... + 580995678.

Almost surely, 2^{12501052523640} is an apocalyptic number.

12501052523640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12501052523640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20914101633600).

12501052523640 is an abundant number, since it is smaller than the sum of its proper divisors (29327150743560).

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

12501052523640 is a wasteful number, since it uses less digits than its factorization.

12501052523640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23551 (or 23541 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 12501052523640 in words is "twelve trillion, five hundred one billion, fifty-two million, five hundred twenty-three thousand, six hundred forty".