1609665332 has 96 divisors (see below), whose sum is σ = 3491268480. Its totient is φ = 639774720.

The previous prime is 1609665331. The next prime is 1609665341. The reversal of 1609665332 is 2335669061.

It is a self number, because there is not a number n which added to its sum of digits gives 1609665332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609665331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 752168 + ... + 754304.

It is an arithmetic number, because the mean of its divisors is an integer number (36367380).

Almost surely, 2^1609665332 is an apocalyptic number.

It is an amenable number.

1609665332 is an abundant number, since it is smaller than the sum of its proper divisors (1881603148).

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

1609665332 is a wasteful number, since it uses less digits than its factorization.

1609665332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241 (or 2239 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 1609665332 is about 40120.6347407416. The cubic root of 1609665332 is about 1171.9575023321.

The spelling of 1609665332 in words is "one billion, six hundred nine million, six hundred sixty-five thousand, three hundred thirty-two".