135698018 has 24 divisors (see below), whose sum is σ = 216537300. Its totient is φ = 63701568.

The previous prime is 135698009. The next prime is 135698023. The reversal of 135698018 is 810896531.

It can be written as a sum of positive squares in 6 ways, for example, as 106028209 + 29669809 = 10297^2 + 5447^2 .

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 11 ways as a sum of consecutive naturals, for example, 78548 + ... + 80256.

Almost surely, 2^135698018 is an apocalyptic number.

135698018 is a deficient number, since it is larger than the sum of its proper divisors (80839282).

135698018 is a wasteful number, since it uses less digits than its factorization.

135698018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 135698018 is about 11648.9492229986. The cubic root of 135698018 is about 513.8754082390.

The spelling of 135698018 in words is "one hundred thirty-five million, six hundred ninety-eight thousand, eighteen".