18170140456643 has 4 divisors (see below), whose sum is σ = 20765874807600. Its totient is φ = 15574406105688.

The previous prime is 18170140456631. The next prime is 18170140456661. The reversal of 18170140456643 is 34665404107181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18170140456643 - 2⁸ = 18170140456387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18170140456591 and 18170140456600.

It is not an unprimeable number, because it can be changed into a prime (18170140456603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297867175468 + ... + 1297867175481.

It is an arithmetic number, because the mean of its divisors is an integer number (5191468701900).

Almost surely, 2^{18170140456643} is an apocalyptic number.

18170140456643 is a deficient number, since it is larger than the sum of its proper divisors (2595734350957).

18170140456643 is an equidigital number, since it uses as much as digits as its factorization.

18170140456643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595734350956.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 18170140456643 in words is "eighteen trillion, one hundred seventy billion, one hundred forty million, four hundred fifty-six thousand, six hundred forty-three".