18577765385 has 8 divisors (see below), whose sum is σ = 22295809536. Its totient is φ = 14860551600.

The previous prime is 18577765363. The next prime is 18577765403. The reversal of 18577765385 is 58356777581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18577765385 - 2¹⁶ = 18577699849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157259 + ... + 248768.

It is an arithmetic number, because the mean of its divisors is an integer number (2786976192).

Almost surely, 2^18577765385 is an apocalyptic number.

It is an amenable number.

18577765385 is a deficient number, since it is larger than the sum of its proper divisors (3718044151).

18577765385 is an equidigital number, since it uses as much as digits as its factorization.

18577765385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415183.

The product of its digits is 49392000, while the sum is 62.

The spelling of 18577765385 in words is "eighteen billion, five hundred seventy-seven million, seven hundred sixty-five thousand, three hundred eighty-five".