16609988325 has 48 divisors (see below), whose sum is σ = 32397418496. Its totient is φ = 7348190400.

The previous prime is 16609988299. The next prime is 16609988327. The reversal of 16609988325 is 52388990661.

It is not a de Polignac number, because 16609988325 - 2⁸ = 16609988069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16609988327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 494017 + ... + 526566.

Almost surely, 2^16609988325 is an apocalyptic number.

16609988325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16609988325 is a deficient number, since it is larger than the sum of its proper divisors (15787430171).

16609988325 is a wasteful number, since it uses less digits than its factorization.

16609988325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020634 (or 1020629 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 16609988325 in words is "sixteen billion, six hundred nine million, nine hundred eighty-eight thousand, three hundred twenty-five".