385155481521 has 16 divisors (see below), whose sum is σ = 528310014336. Its totient is φ = 249479707776.

The previous prime is 385155481457. The next prime is 385155481537. The reversal of 385155481521 is 125184551583.

It is not a de Polignac number, because 385155481521 - 2⁶ = 385155481457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385155481621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11742660 + ... + 11775413.

It is an arithmetic number, because the mean of its divisors is an integer number (33019375896).

Almost surely, 2^385155481521 is an apocalyptic number.

It is an amenable number.

385155481521 is a deficient number, since it is larger than the sum of its proper divisors (143154532815).

385155481521 is a wasteful number, since it uses less digits than its factorization.

385155481521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23518232.

The product of its digits is 960000, while the sum is 48.

The spelling of 385155481521 in words is "three hundred eighty-five billion, one hundred fifty-five million, four hundred eighty-one thousand, five hundred twenty-one".