135680671802745 has 12 divisors (see below), whose sum is σ = 235179831124836. Its totient is φ = 72363024961440.

The previous prime is 135680671802737. The next prime is 135680671802759. The reversal of 135680671802745 is 547208176086531.

It is a happy number.

135680671802745 is a `hidden beast` number, since 1 + 3 + 56 + 80 + 67 + 180 + 274 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 91634460162921 + 44046211639824 = 9572589^2 + 6636732^2 .

It is not a de Polignac number, because 135680671802745 - 2³ = 135680671802737 is a prime.

It is a super-3 number, since 3×135680671802745³ (a number of 43 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1507563019986 + ... + 1507563020075.

It is an arithmetic number, because the mean of its divisors is an integer number (19598319260403).

Almost surely, 2^{135680671802745} is an apocalyptic number.

135680671802745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135680671802745 is a deficient number, since it is larger than the sum of its proper divisors (99499159322091).

135680671802745 is a wasteful number, since it uses less digits than its factorization.

135680671802745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015126040072 (or 3015126040069 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 63.

The spelling of 135680671802745 in words is "one hundred thirty-five trillion, six hundred eighty billion, six hundred seventy-one million, eight hundred two thousand, seven hundred forty-five".