4643990520064 has 243 divisors, whose sum is σ = 10977808111263. Its totient is φ = 1955008742400.

The previous prime is 4643990519951. The next prime is 4643990520083. The reversal of 4643990520064 is 4600250993464.

It is a happy number.

The square root of 4643990520064 is 2154992.

It is a perfect power (a square), and thus also a powerful number.

It is a junction number, because it is equal to n+sod(n) for n = 4643990519993 and 4643990520020.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17136496249 + ... + 17136496519.

Almost surely, 2^{4643990520064} is an apocalyptic number.

4643990520064 is the 2154992-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4643990520064

4643990520064 is an abundant number, since it is smaller than the sum of its proper divisors (6333817591199).

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

4643990520064 is an frugal number, since it uses more digits than its factorization.

4643990520064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 4643990520064 in words is "four trillion, six hundred forty-three billion, nine hundred ninety million, five hundred twenty thousand, sixty-four".