684552939252 has 768 divisors, whose sum is σ = 2201359104000. Its totient is φ = 164846223360.

The previous prime is 684552939221. The next prime is 684552939263. The reversal of 684552939252 is 252939255486.

It is a super-2 number, since 2×684552939252² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 9377437488 + ... + 9377437560.

It is an arithmetic number, because the mean of its divisors is an integer number (2866353000).

Almost surely, 2^684552939252 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 684552939252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100679552000).

684552939252 is an abundant number, since it is smaller than the sum of its proper divisors (1516806164748).

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

684552939252 is a wasteful number, since it uses less digits than its factorization.

684552939252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 176 counting only the distinct ones).

The product of its digits is 46656000, while the sum is 60.

The spelling of 684552939252 in words is "six hundred eighty-four billion, five hundred fifty-two million, nine hundred thirty-nine thousand, two hundred fifty-two".