643132302450 has 96 divisors (see below), whose sum is σ = 1831542416640. Its totient is φ = 147705019200.

The previous prime is 643132302443. The next prime is 643132302473. The reversal of 643132302450 is 54203231346.

It is a happy number.

643132302450 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 (33).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10225944 + ... + 10288643.

It is an arithmetic number, because the mean of its divisors is an integer number (19078566840).

Almost surely, 2^643132302450 is an apocalyptic number.

643132302450 is an abundant number, since it is smaller than the sum of its proper divisors (1188410114190).

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

643132302450 is a wasteful number, since it uses less digits than its factorization.

643132302450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20514632 (or 20514627 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 643132302450 its reverse (54203231346), we get a palindrome (697335533796).

The spelling of 643132302450 in words is "six hundred forty-three billion, one hundred thirty-two million, three hundred two thousand, four hundred fifty".