645436450316 has 48 divisors (see below), whose sum is σ = 1302927151680. Its totient is φ = 274033393920.

The previous prime is 645436450313. The next prime is 645436450339. The reversal of 645436450316 is 613054634546.

It is a super-2 number, since 2×645436450316² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645436450313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24564626 + ... + 24590886.

It is an arithmetic number, because the mean of its divisors is an integer number (27144315660).

Almost surely, 2^645436450316 is an apocalyptic number.

It is an amenable number.

645436450316 is an abundant number, since it is smaller than the sum of its proper divisors (657490701364).

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

645436450316 is a wasteful number, since it uses less digits than its factorization.

645436450316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34434 (or 34432 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 645436450316 in words is "six hundred forty-five billion, four hundred thirty-six million, four hundred fifty thousand, three hundred sixteen".