135717296421 has 16 divisors (see below), whose sum is σ = 206812817024. Its totient is φ = 77550675264.

The previous prime is 135717296389. The next prime is 135717296423. The reversal of 135717296421 is 124692717531.

It is not a de Polignac number, because 135717296421 - 2⁵ = 135717296389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135717296423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1103595 + ... + 1220391.

It is an arithmetic number, because the mean of its divisors is an integer number (12925801064).

Almost surely, 2^135717296421 is an apocalyptic number.

It is an amenable number.

135717296421 is a deficient number, since it is larger than the sum of its proper divisors (71095520603).

135717296421 is a wasteful number, since it uses less digits than its factorization.

135717296421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172140.

The product of its digits is 635040, while the sum is 48.

The spelling of 135717296421 in words is "one hundred thirty-five billion, seven hundred seventeen million, two hundred ninety-six thousand, four hundred twenty-one".