16124137538 has 4 divisors (see below), whose sum is σ = 24186206310. Its totient is φ = 8062068768.

The previous prime is 16124137529. The next prime is 16124137597. The reversal of 16124137538 is 83573142161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83573142161 = 41 ⋅2038369321.

It can be written as a sum of positive squares in only one way, i.e., 16113001969 + 11135569 = 126937^2 + 3337^2 .

It is a super-2 number, since 2×16124137538² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16124137495 and 16124137504.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4031034383 + ... + 4031034386.

Almost surely, 2^16124137538 is an apocalyptic number.

16124137538 is a deficient number, since it is larger than the sum of its proper divisors (8062068772).

16124137538 is an equidigital number, since it uses as much as digits as its factorization.

16124137538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8062068771.

The product of its digits is 120960, while the sum is 41.

Adding to 16124137538 its reverse (83573142161), we get a palindrome (99697279699).

The spelling of 16124137538 in words is "sixteen billion, one hundred twenty-four million, one hundred thirty-seven thousand, five hundred thirty-eight".