643116103315400 has 192 divisors, whose sum is σ = 1758385585494720. Its totient is φ = 215658029030400.

The previous prime is 643116103315363. The next prime is 643116103315453. The reversal of 643116103315400 is 4513301611346.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17872799 + ... + 40070801.

It is an arithmetic number, because the mean of its divisors is an integer number (9158258257785).

Almost surely, 2^{643116103315400} 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 643116103315400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879192792747360).

643116103315400 is an abundant number, since it is smaller than the sum of its proper divisors (1115269482179320).

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

643116103315400 is a wasteful number, since it uses less digits than its factorization.

643116103315400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22199056 (or 22199047 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 643116103315400 its reverse (4513301611346), we get a palindrome (647629404926746).

The spelling of 643116103315400 in words is "six hundred forty-three trillion, one hundred sixteen billion, one hundred three million, three hundred fifteen thousand, four hundred".