135606554 has 16 divisors (see below), whose sum is σ = 210769128. Its totient is φ = 65382912.

The previous prime is 135606547. The next prime is 135606589. The reversal of 135606554 is 455606531.

It can be written as a sum of positive squares in 4 ways, for example, as 121506529 + 14100025 = 11023^2 + 3755^2 .

It is a Curzon number.

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, 254 + ... + 16470.

Almost surely, 2^135606554 is an apocalyptic number.

135606554 is a deficient number, since it is larger than the sum of its proper divisors (75162574).

135606554 is a wasteful number, since it uses less digits than its factorization.

135606554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16369.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 135606554 is about 11645.0227135888. The cubic root of 135606554 is about 513.7599271509.

The spelling of 135606554 in words is "one hundred thirty-five million, six hundred six thousand, five hundred fifty-four".