1213344645687 has 40 divisors (see below), whose sum is σ = 1836120908160. Its totient is φ = 798385669200.

The previous prime is 1213344645677. The next prime is 1213344645707. The reversal of 1213344645687 is 7865464433121.

1213344645687 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 34 + 46 + 4 + 568 + 7 = 666.

It is not a de Polignac number, because 1213344645687 - 2¹⁰ = 1213344644663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213344645637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6980014 + ... + 7151732.

It is an arithmetic number, because the mean of its divisors is an integer number (45903022704).

Almost surely, 2^{1213344645687} is an apocalyptic number.

1213344645687 is a deficient number, since it is larger than the sum of its proper divisors (622776262473).

1213344645687 is a wasteful number, since it uses less digits than its factorization.

1213344645687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172865 (or 172856 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The spelling of 1213344645687 in words is "one trillion, two hundred thirteen billion, three hundred forty-four million, six hundred forty-five thousand, six hundred eighty-seven".