388320316618 has 16 divisors (see below), whose sum is σ = 627297640200. Its totient is φ = 179221625856.

The previous prime is 388320316613. The next prime is 388320316669. The reversal of 388320316618 is 816613023883.

It can be written as a sum of positive squares in 4 ways, for example, as 287528671089 + 100791645529 = 536217^2 + 317477^2 .

It is not an unprimeable number, because it can be changed into a prime (388320316613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2107246 + ... + 2284102.

Almost surely, 2^388320316618 is an apocalyptic number.

388320316618 is a deficient number, since it is larger than the sum of its proper divisors (238977323582).

388320316618 is a wasteful number, since it uses less digits than its factorization.

388320316618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261321.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 388320316618 in words is "three hundred eighty-eight billion, three hundred twenty million, three hundred sixteen thousand, six hundred eighteen".