135106321555 has 4 divisors (see below), whose sum is σ = 162127585872. Its totient is φ = 108085057240.

The previous prime is 135106321531. The next prime is 135106321579. The reversal of 135106321555 is 555123601531.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (135106321531) and next prime (135106321579).

It is not a de Polignac number, because 135106321555 - 2¹¹ = 135106319507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13510632151 + ... + 13510632160.

It is an arithmetic number, because the mean of its divisors is an integer number (40531896468).

Almost surely, 2^135106321555 is an apocalyptic number.

135106321555 is a deficient number, since it is larger than the sum of its proper divisors (27021264317).

135106321555 is an equidigital number, since it uses as much as digits as its factorization.

135106321555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27021264316.

The product of its (nonzero) digits is 67500, while the sum is 37.

The spelling of 135106321555 in words is "one hundred thirty-five billion, one hundred six million, three hundred twenty-one thousand, five hundred fifty-five".