684957390936 has 384 divisors, whose sum is σ = 2186798342400. Its totient is φ = 177159951360.

The previous prime is 684957390889. The next prime is 684957390983. The reversal of 684957390936 is 639093759486.

It is a happy number.

684957390936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (684957390889) and next prime (684957390983).

It is a partition number, being equal to the number of ways a set of 180 identical objects can be partitioned into subset.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 579980266 + ... + 579981446.

It is an arithmetic number, because the mean of its divisors is an integer number (5694787350).

Almost surely, 2^684957390936 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 684957390936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093399171200).

684957390936 is an abundant number, since it is smaller than the sum of its proper divisors (1501840951464).

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

684957390936 is a wasteful number, since it uses less digits than its factorization.

684957390936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919 (or 1908 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 69.

The spelling of 684957390936 in words is "six hundred eighty-four billion, nine hundred fifty-seven million, three hundred ninety thousand, nine hundred thirty-six".