16434272538 has 24 divisors (see below), whose sum is σ = 37702155348. Its totient is φ = 5155850112.

The previous prime is 16434272461. The next prime is 16434272539. The reversal of 16434272538 is 83527243461.

16434272538 is a `hidden beast` number, since 1 + 6 + 4 + 3 + 42 + 72 + 538 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16180603209 + 253669329 = 127203^2 + 15927^2 .

It is a super-2 number, since 2×16434272538² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16434272493 and 16434272502.

It is not an unprimeable number, because it can be changed into a prime (16434272539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26853081 + ... + 26853692.

Almost surely, 2^16434272538 is an apocalyptic number.

16434272538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16434272538 is an abundant number, since it is smaller than the sum of its proper divisors (21267882810).

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

16434272538 is a wasteful number, since it uses less digits than its factorization.

16434272538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53706798 (or 53706795 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 16434272538 in words is "sixteen billion, four hundred thirty-four million, two hundred seventy-two thousand, five hundred thirty-eight".