388761042348021 has 24 divisors (see below), whose sum is σ = 604032311254944. Its totient is φ = 221760114176160.

The previous prime is 388761042347999. The next prime is 388761042348067. The reversal of 388761042348021 is 120843240167883.

It is not a de Polignac number, because 388761042348021 - 2³⁴ = 388743862478837 is a prime.

It is a super-2 number, since 2×388761042348021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388761042348071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2315706730 + ... + 2315874603.

It is an arithmetic number, because the mean of its divisors is an integer number (25168012968956).

Almost surely, 2^{388761042348021} is an apocalyptic number.

It is an amenable number.

388761042348021 is a deficient number, since it is larger than the sum of its proper divisors (215271268906923).

388761042348021 is a wasteful number, since it uses less digits than its factorization.

388761042348021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631581921 (or 4631581914 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 57.

The spelling of 388761042348021 in words is "three hundred eighty-eight trillion, seven hundred sixty-one billion, forty-two million, three hundred forty-eight thousand, twenty-one".