135686873008481 has 8 divisors (see below), whose sum is σ = 139952172006504. Its totient is φ = 131453052232320.

The previous prime is 135686873008457. The next prime is 135686873008501. The reversal of 135686873008481 is 184800378686531.

It can be written as a sum of positive squares in 4 ways, for example, as 8245713256225 + 127441159752256 = 2871535^2 + 11288984^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135686873008481 is a prime.

It is a super-2 number, since 2×135686873008481² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135686873008781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7869546710 + ... + 7869563951.

It is an arithmetic number, because the mean of its divisors is an integer number (17494021500813).

Almost surely, 2^{135686873008481} is an apocalyptic number.

It is an amenable number.

135686873008481 is a deficient number, since it is larger than the sum of its proper divisors (4265298998023).

135686873008481 is a wasteful number, since it uses less digits than its factorization.

135686873008481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15739110931.

The product of its (nonzero) digits is 185794560, while the sum is 68.

The spelling of 135686873008481 in words is "one hundred thirty-five trillion, six hundred eighty-six billion, eight hundred seventy-three million, eight thousand, four hundred eighty-one".