609755616 has 144 divisors (see below), whose sum is σ = 1805207040. Its totient is φ = 195022080.

The previous prime is 609755603. The next prime is 609755617. The reversal of 609755616 is 616557906.

609755616 is a `hidden beast` number, since 6 + 0 + 97 + 556 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×609755616² = 743603822487078912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609755617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1455055 + ... + 1455473.

It is an arithmetic number, because the mean of its divisors is an integer number (12536160).

Almost surely, 2^609755616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609755616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (902603520).

609755616 is an abundant number, since it is smaller than the sum of its proper divisors (1195451424).

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

609755616 is a wasteful number, since it uses less digits than its factorization.

609755616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 609755616 is about 24693.2301653712. The cubic root of 609755616 is about 847.9793367458.

The spelling of 609755616 in words is "six hundred nine million, seven hundred fifty-five thousand, six hundred sixteen".