135686645613631 has 8 divisors (see below), whose sum is σ = 158369823452160. Its totient is φ = 113828310605688.

The previous prime is 135686645613583. The next prime is 135686645613653. The reversal of 135686645613631 is 136316546686531.

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

It is a de Polignac number, because none of the positive numbers 2^k-135686645613631 is a prime.

It is a super-2 number, since 2×135686645613631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135686645613031) 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 7 ways as a sum of consecutive naturals, for example, 206210707291 + ... + 206210707948.

It is an arithmetic number, because the mean of its divisors is an integer number (19796227931520).

Almost surely, 2^{135686645613631} is an apocalyptic number.

135686645613631 is a deficient number, since it is larger than the sum of its proper divisors (22683177838529).

135686645613631 is an equidigital number, since it uses as much as digits as its factorization.

135686645613631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412421415293.

The product of its digits is 167961600, while the sum is 64.

The spelling of 135686645613631 in words is "one hundred thirty-five trillion, six hundred eighty-six billion, six hundred forty-five million, six hundred thirteen thousand, six hundred thirty-one".