12501020541636 has 144 divisors (see below), whose sum is σ = 36517869880128. Its totient is φ = 3563637811200.

The previous prime is 12501020541629. The next prime is 12501020541641. The reversal of 12501020541636 is 63614502010521.

12501020541636 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 1 + 0 + 205 + 416 + 36 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12501020541636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13577016 + ... + 14468496.

It is an arithmetic number, because the mean of its divisors is an integer number (253596318612).

Almost surely, 2^{12501020541636} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12501020541636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18258934940064).

12501020541636 is an abundant number, since it is smaller than the sum of its proper divisors (24016849338492).

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

12501020541636 is a wasteful number, since it uses less digits than its factorization.

12501020541636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893602 (or 893597 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 12501020541636 in words is "twelve trillion, five hundred one billion, twenty million, five hundred forty-one thousand, six hundred thirty-six".