135686645613693 has 6 divisors (see below), whose sum is σ = 195991821442014. Its totient is φ = 90457763742456.

The previous prime is 135686645613677. The next prime is 135686645613749. The reversal of 135686645613693 is 396316546686531.

135686645613693 is a `hidden beast` number, since 1 + 3 + 5 + 6 + 86 + 6 + 456 + 1 + 3 + 6 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 134828395302969 + 858250310724 = 11611563^2 + 926418^2 .

It is not a de Polignac number, because 135686645613693 - 2⁴ = 135686645613677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135686645613653) 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 5 ways as a sum of consecutive naturals, for example, 7538146978530 + ... + 7538146978547.

It is an arithmetic number, because the mean of its divisors is an integer number (32665303573669).

Almost surely, 2^{135686645613693} is an apocalyptic number.

It is an amenable number.

135686645613693 is a deficient number, since it is larger than the sum of its proper divisors (60305175828321).

135686645613693 is a wasteful number, since it uses less digits than its factorization.

135686645613693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15076293957083 (or 15076293957080 counting only the distinct ones).

The product of its digits is 1511654400, while the sum is 72.

The spelling of 135686645613693 in words is "one hundred thirty-five trillion, six hundred eighty-six billion, six hundred forty-five million, six hundred thirteen thousand, six hundred ninety-three".