689887564344 has 320 divisors, whose sum is σ = 2254128069600. Its totient is φ = 194807808000.

The previous prime is 689887564343. The next prime is 689887564351. The reversal of 689887564344 is 443465788986.

689887564344 is a `hidden beast` number, since 6 + 89 + 88 + 75 + 64 + 344 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689887564343) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12210592 + ... + 12266960.

Almost surely, 2^689887564344 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 689887564344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1127064034800).

689887564344 is an abundant number, since it is smaller than the sum of its proper divisors (1564240505256).

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

689887564344 is a wasteful number, since it uses less digits than its factorization.

689887564344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56516 (or 56503 counting only the distinct ones).

The product of its digits is 1114767360, while the sum is 72.

The spelling of 689887564344 in words is "six hundred eighty-nine billion, eight hundred eighty-seven million, five hundred sixty-four thousand, three hundred forty-four".