135830781178561 has 16 divisors (see below), whose sum is σ = 156140635588864. Its totient is φ = 115748072976384.

The previous prime is 135830781178487. The next prime is 135830781178583. The reversal of 135830781178561 is 165871187038531.

It is a cyclic number.

It is not a de Polignac number, because 135830781178561 - 2⁹ = 135830781178049 is a prime.

It is a super-2 number, since 2×135830781178561² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135830781178493 and 135830781178502.

It is not an unprimeable number, because it can be changed into a prime (135830781178361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30495096 + ... + 34664281.

It is an arithmetic number, because the mean of its divisors is an integer number (9758789724304).

Almost surely, 2^{135830781178561} is an apocalyptic number.

It is an amenable number.

135830781178561 is a deficient number, since it is larger than the sum of its proper divisors (20309854410303).

135830781178561 is a wasteful number, since it uses less digits than its factorization.

135830781178561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65161120.

The product of its (nonzero) digits is 33868800, while the sum is 64.

The spelling of 135830781178561 in words is "one hundred thirty-five trillion, eight hundred thirty billion, seven hundred eighty-one million, one hundred seventy-eight thousand, five hundred sixty-one".