18848543794561 has 8 divisors (see below), whose sum is σ = 20341897377984. Its totient is φ = 17361399582480.

The previous prime is 18848543794519. The next prime is 18848543794579. The reversal of 18848543794561 is 16549734584881.

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 18848543794561 - 2⁷ = 18848543794433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18848543794361) 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, 1552336525 + ... + 1552348666.

It is an arithmetic number, because the mean of its divisors is an integer number (2542737172248).

Almost surely, 2^{18848543794561} is an apocalyptic number.

It is an amenable number.

18848543794561 is a deficient number, since it is larger than the sum of its proper divisors (1493353583423).

18848543794561 is a wasteful number, since it uses less digits than its factorization.

18848543794561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104685671.

The product of its digits is 928972800, while the sum is 73.

The spelling of 18848543794561 in words is "eighteen trillion, eight hundred forty-eight billion, five hundred forty-three million, seven hundred ninety-four thousand, five hundred sixty-one".