385188889505 has 12 divisors (see below), whose sum is σ = 537692246100. Its totient is φ = 264129524064.

The previous prime is 385188889453. The next prime is 385188889511. The reversal of 385188889505 is 505988881583.

It can be written as a sum of positive squares in 2 ways, for example, as 49025487889 + 336163401616 = 221417^2 + 579796^2 .

It is not a de Polignac number, because 385188889505 - 2⁸ = 385188889249 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 786099530 + ... + 786100019.

It is an arithmetic number, because the mean of its divisors is an integer number (44807687175).

Almost surely, 2^385188889505 is an apocalyptic number.

385188889505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

385188889505 is a deficient number, since it is larger than the sum of its proper divisors (152503356595).

385188889505 is a wasteful number, since it uses less digits than its factorization.

385188889505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572199568 (or 1572199561 counting only the distinct ones).

The product of its (nonzero) digits is 110592000, while the sum is 68.

The spelling of 385188889505 in words is "three hundred eighty-five billion, one hundred eighty-eight million, eight hundred eighty-nine thousand, five hundred five".