18755444785949 has 4 divisors (see below), whose sum is σ = 19858706243964. Its totient is φ = 17652183327936.

The previous prime is 18755444785937. The next prime is 18755444785997. The reversal of 18755444785949 is 94958744455781.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8616837348025 + 10138607437924 = 2935445^2 + 3184118^2 .

It is a cyclic number.

It is not a de Polignac number, because 18755444785949 - 2¹⁶ = 18755444720413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18755444785919) 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, 551630728982 + ... + 551630729015.

It is an arithmetic number, because the mean of its divisors is an integer number (4964676560991).

Almost surely, 2^{18755444785949} is an apocalyptic number.

It is an amenable number.

18755444785949 is a deficient number, since it is larger than the sum of its proper divisors (1103261458015).

18755444785949 is a wasteful number, since it uses less digits than its factorization.

18755444785949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103261458014.

The product of its digits is 8128512000, while the sum is 80.

The spelling of 18755444785949 in words is "eighteen trillion, seven hundred fifty-five billion, four hundred forty-four million, seven hundred eighty-five thousand, nine hundred forty-nine".