16523444025 has 36 divisors (see below), whose sum is σ = 32285813040. Its totient is φ = 8011365600.

The previous prime is 16523444009. The next prime is 16523444027. The reversal of 16523444025 is 52044432561.

16523444025 is a `hidden beast` number, since 16 + 5 + 234 + 4 + 402 + 5 = 666.

It is not a de Polignac number, because 16523444025 - 2⁴ = 16523444009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16523444027) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3335595 + ... + 3340544.

It is an arithmetic number, because the mean of its divisors is an integer number (896828140).

Almost surely, 2^16523444025 is an apocalyptic number.

16523444025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16523444025 is a deficient number, since it is larger than the sum of its proper divisors (15762369015).

16523444025 is a wasteful number, since it uses less digits than its factorization.

16523444025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6676166 (or 6676158 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 16523444025 its reverse (52044432561), we get a palindrome (68567876586).

It can be divided in two parts, 1652344 and 4025, that added together give a square (1656369 = 1287²).

The spelling of 16523444025 in words is "sixteen billion, five hundred twenty-three million, four hundred forty-four thousand, twenty-five".