645621224363 has 16 divisors (see below), whose sum is σ = 651915808992. Its totient is φ = 639360000000.

The previous prime is 645621224333. The next prime is 645621224393. The reversal of 645621224363 is 363422126546.

It is an interprime number because it is at equal distance from previous prime (645621224333) and next prime (645621224393).

It is a cyclic number.

It is not a de Polignac number, because 645621224363 - 2⁸ = 645621224107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645621224333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145375223 + ... + 145379663.

It is an arithmetic number, because the mean of its divisors is an integer number (40744738062).

Almost surely, 2^645621224363 is an apocalyptic number.

645621224363 is a deficient number, since it is larger than the sum of its proper divisors (6294584629).

645621224363 is a wasteful number, since it uses less digits than its factorization.

645621224363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7886.

The product of its digits is 1244160, while the sum is 44.

The spelling of 645621224363 in words is "six hundred forty-five billion, six hundred twenty-one million, two hundred twenty-four thousand, three hundred sixty-three".