643310564412450 has 192 divisors, whose sum is σ = 1841542494451200. Its totient is φ = 146980442419200.

The previous prime is 643310564412449. The next prime is 643310564412521. The reversal of 643310564412450 is 54214465013346.

It is a self number, because there is not a number n which added to its sum of digits gives 643310564412450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 47110780 + ... + 59211879.

It is an arithmetic number, because the mean of its divisors is an integer number (9591367158600).

Almost surely, 2^{643310564412450} is an apocalyptic number.

643310564412450 is an abundant number, since it is smaller than the sum of its proper divisors (1198231930038750).

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

643310564412450 is a wasteful number, since it uses less digits than its factorization.

643310564412450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106322897 (or 106322892 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 643310564412450 in words is "six hundred forty-three trillion, three hundred ten billion, five hundred sixty-four million, four hundred twelve thousand, four hundred fifty".