645416550322 has 8 divisors (see below), whose sum is σ = 968293593756. Its totient is φ = 322652019072.

The previous prime is 645416550307. The next prime is 645416550323. The reversal of 645416550322 is 223055614546.

It can be written as a sum of positive squares in 2 ways, for example, as 557398121281 + 88018429041 = 746591^2 + 296679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (645416550323) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28113703 + ... + 28136650.

Almost surely, 2^645416550322 is an apocalyptic number.

645416550322 is a deficient number, since it is larger than the sum of its proper divisors (322877043434).

645416550322 is a wasteful number, since it uses less digits than its factorization.

645416550322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56256092.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 645416550322 in words is "six hundred forty-five billion, four hundred sixteen million, five hundred fifty thousand, three hundred twenty-two".