135598554 has 96 divisors (see below), whose sum is σ = 380714880. Its totient is φ = 33872256.

The previous prime is 135598549. The next prime is 135598571. The reversal of 135598554 is 455895531.

135598554 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 98 + 554 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28944 + ... + 33300.

It is an arithmetic number, because the mean of its divisors is an integer number (3965780).

Almost surely, 2^135598554 is an apocalyptic number.

135598554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 135598554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190357440).

135598554 is an abundant number, since it is smaller than the sum of its proper divisors (245116326).

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

135598554 is a wasteful number, since it uses less digits than its factorization.

135598554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404 (or 4401 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The square root of 135598554 is about 11644.6792141304. The cubic root of 135598554 is about 513.7498240005.

The spelling of 135598554 in words is "one hundred thirty-five million, five hundred ninety-eight thousand, five hundred fifty-four".