135131235044 has 48 divisors (see below), whose sum is σ = 259665315840. Its totient is φ = 61150560000.

The previous prime is 135131235037. The next prime is 135131235049. The reversal of 135131235044 is 440532131531.

It is a self number, because there is not a number n which added to its sum of digits gives 135131235044.

It is not an unprimeable number, because it can be changed into a prime (135131235049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117544 + ... + 1232544.

It is an arithmetic number, because the mean of its divisors is an integer number (5409694080).

Almost surely, 2^135131235044 is an apocalyptic number.

It is an amenable number.

135131235044 is a deficient number, since it is larger than the sum of its proper divisors (124534080796).

135131235044 is a wasteful number, since it uses less digits than its factorization.

135131235044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115460 (or 115458 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 135131235044 its reverse (440532131531), we get a palindrome (575663366575).

The spelling of 135131235044 in words is "one hundred thirty-five billion, one hundred thirty-one million, two hundred thirty-five thousand, forty-four".