16199537138 has 4 divisors (see below), whose sum is σ = 24299305710. Its totient is φ = 8099768568.

The previous prime is 16199537129. The next prime is 16199537143. The reversal of 16199537138 is 83173599161.

16199537138 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83173599161 = 68521 ⋅1213841.

It can be written as a sum of positive squares in only one way, i.e., 15429863089 + 769674049 = 124217^2 + 27743^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16199537138.

It is an unprimeable number.

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, 4049884283 + ... + 4049884286.

Almost surely, 2^16199537138 is an apocalyptic number.

16199537138 is a deficient number, since it is larger than the sum of its proper divisors (8099768572).

16199537138 is an equidigital number, since it uses as much as digits as its factorization.

16199537138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8099768571.

The product of its digits is 1224720, while the sum is 53.

The spelling of 16199537138 in words is "sixteen billion, one hundred ninety-nine million, five hundred thirty-seven thousand, one hundred thirty-eight".