16715405138 has 4 divisors (see below), whose sum is σ = 25073107710. Its totient is φ = 8357702568.

The previous prime is 16715405137. The next prime is 16715405167. The reversal of 16715405138 is 83150451761.

16715405138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14569214209 + 2146190929 = 120703^2 + 46327^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16715405095 and 16715405104.

It is not an unprimeable number, because it can be changed into a prime (16715405137) 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 as a sum of consecutive naturals, namely, 4178851283 + ... + 4178851286.

Almost surely, 2^16715405138 is an apocalyptic number.

16715405138 is a deficient number, since it is larger than the sum of its proper divisors (8357702572).

16715405138 is an equidigital number, since it uses as much as digits as its factorization.

16715405138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357702571.

The product of its (nonzero) digits is 100800, while the sum is 41.

Adding to 16715405138 its reverse (83150451761), we get a palindrome (99865856899).

The spelling of 16715405138 in words is "sixteen billion, seven hundred fifteen million, four hundred five thousand, one hundred thirty-eight".