9018138601 has 4 divisors (see below), whose sum is σ = 9107427204. Its totient is φ = 8928850000.

The previous prime is 9018138581. The next prime is 9018138611. The reversal of 9018138601 is 1068318109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1068318109 = 211 ⋅5063119.

It can be written as a sum of positive squares in 2 ways, for example, as 8915136400 + 103002201 = 94420^2 + 10149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9018138601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9018138611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44644150 + ... + 44644351.

It is an arithmetic number, because the mean of its divisors is an integer number (2276856801).

Almost surely, 2^9018138601 is an apocalyptic number.

It is an amenable number.

9018138601 is a deficient number, since it is larger than the sum of its proper divisors (89288603).

9018138601 is a wasteful number, since it uses less digits than its factorization.

9018138601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89288602.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 9018138601 is about 94963.8805072750. The cubic root of 9018138601 is about 2081.4802857173.

The spelling of 9018138601 in words is "nine billion, eighteen million, one hundred thirty-eight thousand, six hundred one".