609645880 has 16 divisors (see below), whose sum is σ = 1371703320. Its totient is φ = 243858336.

The previous prime is 609645863. The next prime is 609645937. The reversal of 609645880 is 88546906.

It is a self number, because there is not a number n which added to its sum of digits gives 609645880.

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, 7620534 + ... + 7620613.

Almost surely, 2^609645880 is an apocalyptic number.

It is an amenable number.

609645880 is an abundant number, since it is smaller than the sum of its proper divisors (762057440).

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

609645880 is a wasteful number, since it uses less digits than its factorization.

609645880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15241158 (or 15241154 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 609645880 is about 24691.0080798658. The cubic root of 609645880 is about 847.9284642100.

The spelling of 609645880 in words is "six hundred nine million, six hundred forty-five thousand, eight hundred eighty".