609939717972 has 192 divisors, whose sum is σ = 1637610670080. Its totient is φ = 175328165376.

The previous prime is 609939717971. The next prime is 609939717973. The reversal of 609939717972 is 279717939906.

It is an interprime number because it is at equal distance from previous prime (609939717971) and next prime (609939717973).

It is a junction number, because it is equal to n+sod(n) for n = 609939717897 and 609939717906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609939717971) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20800273 + ... + 20829575.

It is an arithmetic number, because the mean of its divisors is an integer number (8529222240).

Almost surely, 2^609939717972 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 609939717972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818805335040).

609939717972 is an abundant number, since it is smaller than the sum of its proper divisors (1027670952108).

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

609939717972 is a wasteful number, since it uses less digits than its factorization.

609939717972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29502 (or 29500 counting only the distinct ones).

The product of its (nonzero) digits is 81015228, while the sum is 69.

The spelling of 609939717972 in words is "six hundred nine billion, nine hundred thirty-nine million, seven hundred seventeen thousand, nine hundred seventy-two".