135620553 has 8 divisors (see below), whose sum is σ = 180959328. Its totient is φ = 90347744.

The previous prime is 135620549. The next prime is 135620561. The reversal of 135620553 is 355026531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135620553 - 2² = 135620549 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 135620553.

It is not an unprimeable number, because it can be changed into a prime (135620593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11475 + ... + 20072.

It is an arithmetic number, because the mean of its divisors is an integer number (22619916).

Almost surely, 2^135620553 is an apocalyptic number.

It is an amenable number.

135620553 is a deficient number, since it is larger than the sum of its proper divisors (45338775).

135620553 is a wasteful number, since it uses less digits than its factorization.

135620553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32983.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 135620553 is about 11645.6237703268. The cubic root of 135620553 is about 513.7776054453. Note that the first 3 decimals are identical.

The spelling of 135620553 in words is "one hundred thirty-five million, six hundred twenty thousand, five hundred fifty-three".