18054101661 has 4 divisors (see below), whose sum is σ = 24072135552. Its totient is φ = 12036067772.

The previous prime is 18054101627. The next prime is 18054101669. The reversal of 18054101661 is 16610145081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16610145081 = 3 ⋅5536715027.

It is a cyclic number.

It is not a de Polignac number, because 18054101661 - 2¹⁴ = 18054085277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18054101669) 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, 3009016941 + ... + 3009016946.

It is an arithmetic number, because the mean of its divisors is an integer number (6018033888).

Almost surely, 2^18054101661 is an apocalyptic number.

It is an amenable number.

18054101661 is a deficient number, since it is larger than the sum of its proper divisors (6018033891).

18054101661 is an equidigital number, since it uses as much as digits as its factorization.

18054101661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6018033890.

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 18054101661 in words is "eighteen billion, fifty-four million, one hundred one thousand, six hundred sixty-one".