135781359813 has 24 divisors (see below), whose sum is σ = 213979296960. Its totient is φ = 82283736960.

The previous prime is 135781359773. The next prime is 135781359817. The reversal of 135781359813 is 318953187531.

It is a happy number.

135781359813 is a `hidden beast` number, since 1 + 3 + 578 + 1 + 3 + 59 + 8 + 13 = 666.

It is not a de Polignac number, because 135781359813 - 2³² = 131486392517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135781359813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135781359817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1051645 + ... + 1173677.

It is an arithmetic number, because the mean of its divisors is an integer number (8915804040).

Almost surely, 2^135781359813 is an apocalyptic number.

It is an amenable number.

135781359813 is a deficient number, since it is larger than the sum of its proper divisors (78197937147).

135781359813 is a wasteful number, since it uses less digits than its factorization.

135781359813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133289 (or 133286 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

It can be divided in two parts, 135781 and 359813, that added together give a palindrome (495594).

The spelling of 135781359813 in words is "one hundred thirty-five billion, seven hundred eighty-one million, three hundred fifty-nine thousand, eight hundred thirteen".