16565234436 has 81 divisors (see below), whose sum is σ = 44232256341. Its totient is φ = 5226493248.

The previous prime is 16565234423. The next prime is 16565234447. The reversal of 16565234436 is 63443256561.

The square root of 16565234436 is 128706.

It is a perfect power (a square), and thus also a powerful number.

16565234436 is a `hidden beast` number, since 1 + 6 + 56 + 523 + 44 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1406700036 + 15158534400 = 37506^2 + 123120^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16565234391 and 16565234400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14671920 + ... + 14673048.

Almost surely, 2^16565234436 is an apocalyptic number.

16565234436 is the 128706-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16565234436

16565234436 is an abundant number, since it is smaller than the sum of its proper divisors (27667021905).

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

16565234436 is a wasteful number, since it uses less digits than its factorization.

16565234436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 1153 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 45.

It can be divided in two parts, 16565 and 234436, that added together give a square (251001 = 501²).

The spelling of 16565234436 in words is "sixteen billion, five hundred sixty-five million, two hundred thirty-four thousand, four hundred thirty-six".