12820087563156 has 72 divisors (see below), whose sum is σ = 33201339260544. Its totient is φ = 4168555397760.

The previous prime is 12820087563139. The next prime is 12820087563163. The reversal of 12820087563156 is 65136578002821.

12820087563156 is a `hidden beast` number, since 1 + 2 + 8 + 20 + 0 + 8 + 7 + 563 + 1 + 56 = 666.

12820087563156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10097311 + ... + 11295833.

It is an arithmetic number, because the mean of its divisors is an integer number (461129711952).

Almost surely, 2^{12820087563156} is an apocalyptic number.

It is an amenable number.

12820087563156 is an abundant number, since it is smaller than the sum of its proper divisors (20381251697388).

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

12820087563156 is a wasteful number, since it uses less digits than its factorization.

12820087563156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205821 (or 1205816 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 12820087563156 in words is "twelve trillion, eight hundred twenty billion, eighty-seven million, five hundred sixty-three thousand, one hundred fifty-six".