135621168 has 40 divisors (see below), whose sum is σ = 362439600. Its totient is φ = 43647744.

The previous prime is 135621149. The next prime is 135621173. The reversal of 135621168 is 861126531.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47323 + ... + 50106.

It is an arithmetic number, because the mean of its divisors is an integer number (9060990).

Almost surely, 2^135621168 is an apocalyptic number.

It is an amenable number.

135621168 is an abundant number, since it is smaller than the sum of its proper divisors (226818432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135621168 is a wasteful number, since it uses less digits than its factorization.

135621168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97469 (or 97463 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 135621168 is about 11645.6501750654. The cubic root of 135621168 is about 513.7783820551.

Adding to 135621168 its reverse (861126531), we get a palindrome (996747699).

The spelling of 135621168 in words is "one hundred thirty-five million, six hundred twenty-one thousand, one hundred sixty-eight".