609172656 has 40 divisors (see below), whose sum is σ = 1584136704. Its totient is φ = 201710400.

The previous prime is 609172649. The next prime is 609172673. The reversal of 609172656 is 656271906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34776 + ... + 49271.

Almost surely, 2^609172656 is an apocalyptic number.

It is an amenable number.

609172656 is an abundant number, since it is smaller than the sum of its proper divisors (974964048).

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

609172656 is a wasteful number, since it uses less digits than its factorization.

609172656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84209 (or 84203 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 609172656 is about 24681.4232976950. The cubic root of 609172656 is about 847.7090122404.

The spelling of 609172656 in words is "six hundred nine million, one hundred seventy-two thousand, six hundred fifty-six".