645300756863 has 8 divisors (see below), whose sum is σ = 739496082432. Its totient is φ = 551607807096.

The previous prime is 645300756853. The next prime is 645300756923. The reversal of 645300756863 is 368657003546.

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

It is a cyclic number.

It is not a de Polignac number, because 645300756863 - 2⁴ = 645300756847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645300756823) 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 7 ways as a sum of consecutive naturals, for example, 125591195 + ... + 125596332.

It is an arithmetic number, because the mean of its divisors is an integer number (92437010304).

Almost surely, 2^645300756863 is an apocalyptic number.

645300756863 is a deficient number, since it is larger than the sum of its proper divisors (94195325569).

645300756863 is a wasteful number, since it uses less digits than its factorization.

645300756863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251187901.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 645300756863 in words is "six hundred forty-five billion, three hundred million, seven hundred fifty-six thousand, eight hundred sixty-three".