12781946484391 has 8 divisors (see below), whose sum is σ = 14609096554880. Its totient is φ = 10955085842808.

The previous prime is 12781946484379. The next prime is 12781946484407. The reversal of 12781946484391 is 19348464918721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12781946484391 - 2¹¹ = 12781946482343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12781946484301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72262581 + ... + 72439246.

It is an arithmetic number, because the mean of its divisors is an integer number (1826137069360).

Almost surely, 2^{12781946484391} is an apocalyptic number.

12781946484391 is a deficient number, since it is larger than the sum of its proper divisors (1827150070489).

12781946484391 is a wasteful number, since it uses less digits than its factorization.

12781946484391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144714453.

The product of its digits is 83607552, while the sum is 67.

The spelling of 12781946484391 in words is "twelve trillion, seven hundred eighty-one billion, nine hundred forty-six million, four hundred eighty-four thousand, three hundred ninety-one".