8131783387613 has 16 divisors (see below), whose sum is σ = 8344719524736. Its totient is φ = 7921920476160.

The previous prime is 8131783387601. The next prime is 8131783387621. The reversal of 8131783387613 is 3167833871318.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8131783387613 - 2¹⁰ = 8131783386589 is a prime.

It is a super-2 number, since 2×8131783387613² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8131783387633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2420198 + ... + 4703288.

It is an arithmetic number, because the mean of its divisors is an integer number (521544970296).

Almost surely, 2^{8131783387613} is an apocalyptic number.

It is an amenable number.

8131783387613 is a deficient number, since it is larger than the sum of its proper divisors (212936137123).

8131783387613 is a wasteful number, since it uses less digits than its factorization.

8131783387613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283764.

The product of its digits is 12192768, while the sum is 59.

The spelling of 8131783387613 in words is "eight trillion, one hundred thirty-one billion, seven hundred eighty-three million, three hundred eighty-seven thousand, six hundred thirteen".