689631604992 has 432 divisors, whose sum is σ = 2268341100480. Its totient is φ = 208954183680.

The previous prime is 689631604969. The next prime is 689631605053. The reversal of 689631604992 is 299406136986.

689631604992 is a `hidden beast` number, since 6 + 89 + 6 + 3 + 1 + 60 + 499 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82794684 + ... + 82803012.

Almost surely, 2^689631604992 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 689631604992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134170550240).

689631604992 is an abundant number, since it is smaller than the sum of its proper divisors (1578709495488).

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

689631604992 is an frugal number, since it uses more digits than its factorization.

689631604992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8393 (or 8345 counting only the distinct ones).

The product of its (nonzero) digits is 30233088, while the sum is 63.

The spelling of 689631604992 in words is "six hundred eighty-nine billion, six hundred thirty-one million, six hundred four thousand, nine hundred ninety-two".