388521853381 has 24 divisors (see below), whose sum is σ = 431376429600. Its totient is φ = 349357186080.

The previous prime is 388521853361. The next prime is 388521853481. The reversal of 388521853381 is 183358125883.

It is not a de Polignac number, because 388521853381 - 2³³ = 379931918789 is a prime.

It is a super-2 number, since 2×388521853381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388521853301) 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 23 ways as a sum of consecutive naturals, for example, 303166 + ... + 932176.

It is an arithmetic number, because the mean of its divisors is an integer number (17974017900).

Almost surely, 2^388521853381 is an apocalyptic number.

It is an amenable number.

388521853381 is a deficient number, since it is larger than the sum of its proper divisors (42854576219).

388521853381 is a wasteful number, since it uses less digits than its factorization.

388521853381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629137 (or 629118 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 55.

The spelling of 388521853381 in words is "three hundred eighty-eight billion, five hundred twenty-one million, eight hundred fifty-three thousand, three hundred eighty-one".