135120642015 has 16 divisors (see below), whose sum is σ = 221466028896. Its totient is φ = 70306675200.

The previous prime is 135120641993. The next prime is 135120642109. The reversal of 135120642015 is 510246021531.

It is not a de Polignac number, because 135120642015 - 2¹¹ = 135120639967 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109853566 + ... + 109854795.

It is an arithmetic number, because the mean of its divisors is an integer number (13841626806).

Almost surely, 2^135120642015 is an apocalyptic number.

135120642015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135120642015 is a deficient number, since it is larger than the sum of its proper divisors (86345386881).

135120642015 is a wasteful number, since it uses less digits than its factorization.

135120642015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219708410.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 135120642015 its reverse (510246021531), we get a palindrome (645366663546).

The spelling of 135120642015 in words is "one hundred thirty-five billion, one hundred twenty million, six hundred forty-two thousand, fifteen".