388115621089 has 10 divisors (see below), whose sum is σ = 452774619490. Its totient is φ = 332670530304.

The previous prime is 388115621081. The next prime is 388115621093. The reversal of 388115621089 is 980126511883.

It can be written as a sum of positive squares in only one way, i.e., 340462914064 + 47652707025 = 583492^2 + 218295^2 .

It is not a de Polignac number, because 388115621089 - 2³ = 388115621081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388115621081) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 80821344 + ... + 80826145.

It is an arithmetic number, because the mean of its divisors is an integer number (45277461949).

Almost surely, 2^388115621089 is an apocalyptic number.

It is an amenable number.

388115621089 is a deficient number, since it is larger than the sum of its proper divisors (64658998401).

388115621089 is an frugal number, since it uses more digits than its factorization.

388115621089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161647517 (or 161647496 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 52.

The spelling of 388115621089 in words is "three hundred eighty-eight billion, one hundred fifteen million, six hundred twenty-one thousand, eighty-nine".