609649520 has 20 divisors (see below), whose sum is σ = 1417435320. Its totient is φ = 243859776.

The previous prime is 609649507. The next prime is 609649531. The reversal of 609649520 is 25946906.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3810230 + ... + 3810389.

It is an arithmetic number, because the mean of its divisors is an integer number (70871766).

Almost surely, 2^609649520 is an apocalyptic number.

It is an amenable number.

609649520 is an abundant number, since it is smaller than the sum of its proper divisors (807785800).

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

609649520 is a wasteful number, since it uses less digits than its factorization.

609649520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7620632 (or 7620626 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 609649520 is about 24691.0817908005. The cubic root of 609649520 is about 847.9301517763.

The spelling of 609649520 in words is "six hundred nine million, six hundred forty-nine thousand, five hundred twenty".