645344400313622 has 16 divisors (see below), whose sum is σ = 1024959395566512. Its totient is φ = 303691292240640.

The previous prime is 645344400313621. The next prime is 645344400313681. The reversal of 645344400313622 is 226313004443546.

It is a super-2 number, since 2×645344400313622² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645344400313621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59593097 + ... + 69584667.

It is an arithmetic number, because the mean of its divisors is an integer number (64059962222907).

Almost surely, 2^{645344400313622} is an apocalyptic number.

645344400313622 is a deficient number, since it is larger than the sum of its proper divisors (379614995252890).

645344400313622 is a wasteful number, since it uses less digits than its factorization.

645344400313622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11891263.

The product of its (nonzero) digits is 4976640, while the sum is 47.

The spelling of 645344400313622 in words is "six hundred forty-five trillion, three hundred forty-four billion, four hundred million, three hundred thirteen thousand, six hundred twenty-two".