385521255385 has 32 divisors (see below), whose sum is σ = 560007613440. Its totient is φ = 248721718272.

The previous prime is 385521255377. The next prime is 385521255503. The reversal of 385521255385 is 583552125583.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 385521255385 - 2³ = 385521255377 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, 1649856 + ... + 1868974.

It is an arithmetic number, because the mean of its divisors is an integer number (17500237920).

Almost surely, 2^385521255385 is an apocalyptic number.

385521255385 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

385521255385 is a deficient number, since it is larger than the sum of its proper divisors (174486358055).

385521255385 is a wasteful number, since it uses less digits than its factorization.

385521255385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222105.

The product of its digits is 7200000, while the sum is 52.

The spelling of 385521255385 in words is "three hundred eighty-five billion, five hundred twenty-one million, two hundred fifty-five thousand, three hundred eighty-five".