16538932738 has 8 divisors (see below), whose sum is σ = 24809089788. Its totient is φ = 8269236144.

The previous prime is 16538932733. The next prime is 16538932747. The reversal of 16538932738 is 83723983561.

It can be written as a sum of positive squares in 2 ways, for example, as 15120883089 + 1418049649 = 122967^2 + 37657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×16538932738² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16538932733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3781 + ... + 181912.

Almost surely, 2^16538932738 is an apocalyptic number.

16538932738 is a deficient number, since it is larger than the sum of its proper divisors (8270157050).

16538932738 is a wasteful number, since it uses less digits than its factorization.

16538932738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230228.

The product of its digits is 6531840, while the sum is 55.

The spelling of 16538932738 in words is "sixteen billion, five hundred thirty-eight million, nine hundred thirty-two thousand, seven hundred thirty-eight".