645443200050450 has 96 divisors (see below), whose sum is σ = 1601104942225152. Its totient is φ = 172074556992000.

The previous prime is 645443200050437. The next prime is 645443200050479. The reversal of 645443200050450 is 54050002344546.

It is a happy number.

It is a Curzon number.

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, 14292025870 + ... + 14292071030.

It is an arithmetic number, because the mean of its divisors is an integer number (16678176481512).

Almost surely, 2^{645443200050450} is an apocalyptic number.

645443200050450 is an abundant number, since it is smaller than the sum of its proper divisors (955661742174702).

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

645443200050450 is a wasteful number, since it uses less digits than its factorization.

645443200050450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67220 (or 67215 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 42.

Adding to 645443200050450 its reverse (54050002344546), we get a palindrome (699493202394996).

The spelling of 645443200050450 in words is "six hundred forty-five trillion, four hundred forty-three billion, two hundred million, fifty thousand, four hundred fifty".