2609321616 has 60 divisors (see below), whose sum is σ = 7966342800. Its totient is φ = 790703040.

The previous prime is 2609321579. The next prime is 2609321681. The reversal of 2609321616 is 6161239062.

It is a happy number.

2609321616 is a `hidden beast` number, since 2 + 6 + 0 + 9 + 32 + 1 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 822066 + ... + 825233.

It is an arithmetic number, because the mean of its divisors is an integer number (132772380).

Almost surely, 2^2609321616 is an apocalyptic number.

It is an amenable number.

2609321616 is an abundant number, since it is smaller than the sum of its proper divisors (5357021184).

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

2609321616 is a wasteful number, since it uses less digits than its factorization.

2609321616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647324 (or 1647315 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 2609321616 is about 51081.5193196130. The cubic root of 2609321616 is about 1376.7102229756.

The spelling of 2609321616 in words is "two billion, six hundred nine million, three hundred twenty-one thousand, six hundred sixteen".