18783605428385 has 32 divisors (see below), whose sum is σ = 26123798592000. Its totient is φ = 12698482245120.

The previous prime is 18783605428363. The next prime is 18783605428391. The reversal of 18783605428385 is 58382450638781.

It is not a de Polignac number, because 18783605428385 - 2⁶ = 18783605428321 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197780891 + ... + 197875839.

It is an arithmetic number, because the mean of its divisors is an integer number (816368706000).

Almost surely, 2^{18783605428385} is an apocalyptic number.

It is an amenable number.

18783605428385 is a deficient number, since it is larger than the sum of its proper divisors (7340193163615).

18783605428385 is an equidigital number, since it uses as much as digits as its factorization.

18783605428385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174641.

The product of its (nonzero) digits is 309657600, while the sum is 68.

The spelling of 18783605428385 in words is "eighteen trillion, seven hundred eighty-three billion, six hundred five million, four hundred twenty-eight thousand, three hundred eighty-five".