609401565696 has 640 divisors, whose sum is σ = 2066547732480. Its totient is φ = 156297461760.

The previous prime is 609401565683. The next prime is 609401565701. The reversal of 609401565696 is 696565104906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1388158245 + ... + 1388158683.

It is an arithmetic number, because the mean of its divisors is an integer number (3228980832).

Almost surely, 2^609401565696 is an apocalyptic number.

609401565696 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609401565696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1033273866240).

609401565696 is an abundant number, since it is smaller than the sum of its proper divisors (1457146166784).

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

609401565696 is an equidigital number, since it uses as much as digits as its factorization.

609401565696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 57.

The spelling of 609401565696 in words is "six hundred nine billion, four hundred one million, five hundred sixty-five thousand, six hundred ninety-six".