135688678846581 has 16 divisors (see below), whose sum is σ = 206776795373568. Its totient is φ = 77531477559600.

The previous prime is 135688678846579. The next prime is 135688678846607. The reversal of 135688678846581 is 185648876886531.

135688678846581 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135688678846581 - 2¹ = 135688678846579 is a prime.

It is a super-2 number, since 2×135688678846581² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135688678846494 and 135688678846503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135688678866581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204258525 + ... + 204921746.

It is an arithmetic number, because the mean of its divisors is an integer number (12923549710848).

Almost surely, 2^{135688678846581} is an apocalyptic number.

It is an amenable number.

135688678846581 is a deficient number, since it is larger than the sum of its proper divisors (71088116526987).

135688678846581 is a wasteful number, since it uses less digits than its factorization.

135688678846581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409196072.

The product of its digits is 14863564800, while the sum is 84.

The spelling of 135688678846581 in words is "one hundred thirty-five trillion, six hundred eighty-eight billion, six hundred seventy-eight million, eight hundred forty-six thousand, five hundred eighty-one".