18166575036593 has 8 divisors (see below), whose sum is σ = 18555815843712. Its totient is φ = 17777447476816.

The previous prime is 18166575036587. The next prime is 18166575036691. The reversal of 18166575036593 is 39563057566181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18166575036593 - 2¹² = 18166575032497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18166575036583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27987530 + ... + 28629267.

It is an arithmetic number, because the mean of its divisors is an integer number (2319476980464).

Almost surely, 2^{18166575036593} is an apocalyptic number.

It is an amenable number.

18166575036593 is a deficient number, since it is larger than the sum of its proper divisors (389240807119).

18166575036593 is an equidigital number, since it uses as much as digits as its factorization.

18166575036593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56623671.

The product of its (nonzero) digits is 122472000, while the sum is 65.

The spelling of 18166575036593 in words is "eighteen trillion, one hundred sixty-six billion, five hundred seventy-five million, thirty-six thousand, five hundred ninety-three".