388143604691868 has 12 divisors (see below), whose sum is σ = 905668410947720. Its totient is φ = 129381201563952.

The previous prime is 388143604691771. The next prime is 388143604691897. The reversal of 388143604691868 is 868196406341883.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 388143604691868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16172650195483 + ... + 16172650195506.

Almost surely, 2^{388143604691868} is an apocalyptic number.

It is an amenable number.

388143604691868 is an abundant number, since it is smaller than the sum of its proper divisors (517524806255852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388143604691868 is a wasteful number, since it uses less digits than its factorization.

388143604691868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32345300390996 (or 32345300390994 counting only the distinct ones).

The product of its (nonzero) digits is 1146617856, while the sum is 75.

The spelling of 388143604691868 in words is "three hundred eighty-eight trillion, one hundred forty-three billion, six hundred four million, six hundred ninety-one thousand, eight hundred sixty-eight".