646483237908480 has 3744 divisors, whose sum is σ = 2824720882401600. Its totient is φ = 141234781814784.

The previous prime is 646483237908479. The next prime is 646483237908493. The reversal of 646483237908480 is 84809732384646.

It is a happy number.

646483237908480 is a `hidden beast` number, since 6 + 4 + 6 + 48 + 32 + 3 + 79 + 0 + 8 + 480 = 666.

646483237908480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 646483237908399 and 646483237908408.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 799114014316 + ... + 799114015124.

It is an arithmetic number, because the mean of its divisors is an integer number (754466047650).

Almost surely, 2^{646483237908480} is an apocalyptic number.

646483237908480 is a gapful number since it is divisible by the number (60) 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 646483237908480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1412360441200800).

646483237908480 is an abundant number, since it is smaller than the sum of its proper divisors (2178237644493120).

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

646483237908480 is a wasteful number, since it uses less digits than its factorization.

646483237908480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 1337720832, while the sum is 72.

The spelling of 646483237908480 in words is "six hundred forty-six trillion, four hundred eighty-three billion, two hundred thirty-seven million, nine hundred eight thousand, four hundred eighty".