645451506332 has 12 divisors (see below), whose sum is σ = 1131859523760. Its totient is φ = 322063070976.

The previous prime is 645451506313. The next prime is 645451506367. The reversal of 645451506332 is 233605154546.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 165668357 + ... + 165672252.

It is an arithmetic number, because the mean of its divisors is an integer number (94321626980).

Almost surely, 2^645451506332 is an apocalyptic number.

It is an amenable number.

645451506332 is a deficient number, since it is larger than the sum of its proper divisors (486408017428).

645451506332 is a wasteful number, since it uses less digits than its factorization.

645451506332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331341100 (or 331341098 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 645451506332 in words is "six hundred forty-five billion, four hundred fifty-one million, five hundred six thousand, three hundred thirty-two".