135681355812 has 12 divisors (see below), whose sum is σ = 316589830256. Its totient is φ = 45227118600.

The previous prime is 135681355807. The next prime is 135681355853. The reversal of 135681355812 is 218553186531.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5653389814 + ... + 5653389837.

Almost surely, 2^135681355812 is an apocalyptic number.

135681355812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135681355812 is an abundant number, since it is smaller than the sum of its proper divisors (180908474444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135681355812 is a wasteful number, since it uses less digits than its factorization.

135681355812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11306779658 (or 11306779656 counting only the distinct ones).

The product of its digits is 864000, while the sum is 48.

The spelling of 135681355812 in words is "one hundred thirty-five billion, six hundred eighty-one million, three hundred fifty-five thousand, eight hundred twelve".