609388164 has 192 divisors, whose sum is σ = 1988689920. Its totient is φ = 156764160.

The previous prime is 609388147. The next prime is 609388183. The reversal of 609388164 is 461883906.

609388164 is a `hidden beast` number, since 609 + 38 + 8 + 1 + 6 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1055844 + ... + 1056420.

It is an arithmetic number, because the mean of its divisors is an integer number (10357760).

Almost surely, 2^609388164 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 609388164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994344960).

609388164 is an abundant number, since it is smaller than the sum of its proper divisors (1379301756).

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

609388164 is a wasteful number, since it uses less digits than its factorization.

609388164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 609388164 is about 24685.7887052450. The cubic root of 609388164 is about 847.8089655858.

The spelling of 609388164 in words is "six hundred nine million, three hundred eighty-eight thousand, one hundred sixty-four".