16388742438 has 24 divisors (see below), whose sum is σ = 35512335768. Its totient is φ = 5462392032.

The previous prime is 16388742401. The next prime is 16388742439. The reversal of 16388742438 is 83424788361.

16388742438 is a `hidden beast` number, since 1 + 63 + 88 + 74 + 2 + 438 = 666.

16388742438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16388742439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181506 + ... + 256362.

It is an arithmetic number, because the mean of its divisors is an integer number (1479680657).

Almost surely, 2^16388742438 is an apocalyptic number.

16388742438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16388742438 is an abundant number, since it is smaller than the sum of its proper divisors (19123593330).

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

16388742438 is a wasteful number, since it uses less digits than its factorization.

16388742438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87028 (or 87025 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The spelling of 16388742438 in words is "sixteen billion, three hundred eighty-eight million, seven hundred forty-two thousand, four hundred thirty-eight".