18785076643385 has 48 divisors (see below), whose sum is σ = 25253196044400. Its totient is φ = 13392646106112.

The previous prime is 18785076643357. The next prime is 18785076643423. The reversal of 18785076643385 is 58334667058781.

It can be written as a sum of positive squares in 24 ways, for example, as 13573594903696 + 5211481739689 = 3684236^2 + 2282867^2 .

It is not a de Polignac number, because 18785076643385 - 2¹⁰ = 18785076642361 is a prime.

It is a hoax number, since the sum of its digits (71) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 435897899 + ... + 435940991.

It is an arithmetic number, because the mean of its divisors is an integer number (526108250925).

Almost surely, 2^{18785076643385} is an apocalyptic number.

It is an amenable number.

18785076643385 is a deficient number, since it is larger than the sum of its proper divisors (6468119401015).

18785076643385 is a wasteful number, since it uses less digits than its factorization.

18785076643385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60942 (or 60929 counting only the distinct ones).

The product of its (nonzero) digits is 812851200, while the sum is 71.

The spelling of 18785076643385 in words is "eighteen trillion, seven hundred eighty-five billion, seventy-six million, six hundred forty-three thousand, three hundred eighty-five".