12381865489564 has 12 divisors (see below), whose sum is σ = 21973451432688. Its totient is φ = 6103736508800.

The previous prime is 12381865489523. The next prime is 12381865489571. The reversal of 12381865489564 is 46598456818321.

It is a junction number, because it is equal to n+sod(n) for n = 12381865489493 and 12381865489502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21799058677 + ... + 21799059244.

It is an arithmetic number, because the mean of its divisors is an integer number (1831120952724).

Almost surely, 2^{12381865489564} is an apocalyptic number.

It is an amenable number.

12381865489564 is a deficient number, since it is larger than the sum of its proper divisors (9591585943124).

12381865489564 is a wasteful number, since it uses less digits than its factorization.

12381865489564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43598117996 (or 43598117994 counting only the distinct ones).

The product of its digits is 398131200, while the sum is 70.

The spelling of 12381865489564 in words is "twelve trillion, three hundred eighty-one billion, eight hundred sixty-five million, four hundred eighty-nine thousand, five hundred sixty-four".