185404020385 has 8 divisors (see below), whose sum is σ = 222910228800. Its totient is φ = 148039613424.

The previous prime is 185404020383. The next prime is 185404020409. The reversal of 185404020385 is 583020404581.

185404020385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 185404020385 - 2¹ = 185404020383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (185404020383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35447485 + ... + 35452714.

It is an arithmetic number, because the mean of its divisors is an integer number (27863778600).

Almost surely, 2^185404020385 is an apocalyptic number.

It is an amenable number.

185404020385 is a deficient number, since it is larger than the sum of its proper divisors (37506208415).

185404020385 is an equidigital number, since it uses as much as digits as its factorization.

185404020385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70900727.

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 185404020385 in words is "one hundred eighty-five billion, four hundred four million, twenty thousand, three hundred eighty-five".