135681013087664 has 20 divisors (see below), whose sum is σ = 286780323117480. Its totient is φ = 61673187767040.

The previous prime is 135681013087637. The next prime is 135681013087733. The reversal of 135681013087664 is 466780310186531.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385457423369 + ... + 385457423720.

It is an arithmetic number, because the mean of its divisors is an integer number (14339016155874).

Almost surely, 2^{135681013087664} is an apocalyptic number.

It is an amenable number.

135681013087664 is an abundant number, since it is smaller than the sum of its proper divisors (151099310029816).

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

135681013087664 is a wasteful number, since it uses less digits than its factorization.

135681013087664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770914847108 (or 770914847102 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 135681013087664 in words is "one hundred thirty-five trillion, six hundred eighty-one billion, thirteen million, eighty-seven thousand, six hundred sixty-four".