689418791424 has 480 divisors, whose sum is σ = 2268031461696. Its totient is φ = 207333457920.

The previous prime is 689418791371. The next prime is 689418791429. The reversal of 689418791424 is 424197814986.

689418791424 is a `hidden beast` number, since 6 + 8 + 9 + 41 + 87 + 91 + 424 = 666.

It is not an unprimeable number, because it can be changed into a prime (689418791429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187493074 + ... + 187496750.

Almost surely, 2^689418791424 is an apocalyptic number.

689418791424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689418791424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134015730848).

689418791424 is an abundant number, since it is smaller than the sum of its proper divisors (1578612670272).

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

689418791424 is a wasteful number, since it uses less digits than its factorization.

689418791424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858 (or 3830 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 689418791424 in words is "six hundred eighty-nine billion, four hundred eighteen million, seven hundred ninety-one thousand, four hundred twenty-four".