135044331165 has 40 divisors (see below), whose sum is σ = 243846571320. Its totient is φ = 71497893888.

The previous prime is 135044331139. The next prime is 135044331173. The reversal of 135044331165 is 561133440531.

135044331165 is a `hidden beast` number, since 1 + 3 + 50 + 443 + 3 + 1 + 165 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 62406534969 + 72637796196 = 249813^2 + 269514^2 .

It is not a de Polignac number, because 135044331165 - 2¹² = 135044327069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1161460 + ... + 1272429.

It is an arithmetic number, because the mean of its divisors is an integer number (6096164283).

Almost surely, 2^135044331165 is an apocalyptic number.

135044331165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135044331165 is a deficient number, since it is larger than the sum of its proper divisors (108802240155).

135044331165 is a wasteful number, since it uses less digits than its factorization.

135044331165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434043 (or 2434034 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 135044331165 its reverse (561133440531), we get a palindrome (696177771696).

The spelling of 135044331165 in words is "one hundred thirty-five billion, forty-four million, three hundred thirty-one thousand, one hundred sixty-five".