135506805424917 has 4 divisors (see below), whose sum is σ = 180675740566560. Its totient is φ = 90337870283276.

The previous prime is 135506805424877. The next prime is 135506805424927. The reversal of 135506805424917 is 719424508605531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135506805424917 - 2¹² = 135506805420821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135506805424927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22584467570817 + ... + 22584467570822.

It is an arithmetic number, because the mean of its divisors is an integer number (45168935141640).

It is a 1-persistent number, because it is pandigital, but 2⋅135506805424917 = 271013610849834 is not.

Almost surely, 2^{135506805424917} is an apocalyptic number.

It is an amenable number.

135506805424917 is a deficient number, since it is larger than the sum of its proper divisors (45168935141643).

135506805424917 is an equidigital number, since it uses as much as digits as its factorization.

135506805424917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45168935141642.

The product of its (nonzero) digits is 36288000, while the sum is 60.

The spelling of 135506805424917 in words is "one hundred thirty-five trillion, five hundred six billion, eight hundred five million, four hundred twenty-four thousand, nine hundred seventeen".