18158706643038 has 48 divisors (see below), whose sum is σ = 39340425761280. Its totient is φ = 5585238595872.

The previous prime is 18158706643013. The next prime is 18158706643079. The reversal of 18158706643038 is 83034660785181.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 536056 + ... + 6050187.

It is an arithmetic number, because the mean of its divisors is an integer number (819592203360).

Almost surely, 2^{18158706643038} is an apocalyptic number.

18158706643038 is an abundant number, since it is smaller than the sum of its proper divisors (21181719118242).

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

18158706643038 is a wasteful number, since it uses less digits than its factorization.

18158706643038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6588993 (or 6588980 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 18158706643038 in words is "eighteen trillion, one hundred fifty-eight billion, seven hundred six million, six hundred forty-three thousand, thirty-eight".