645622703503 has 2 divisors, whose sum is σ = 645622703504. Its totient is φ = 645622703502.

The previous prime is 645622703501. The next prime is 645622703573. The reversal of 645622703503 is 305307226546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645622703503 - 2¹ = 645622703501 is a prime.

Together with 645622703501, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 645622703503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645622703501) by changing a digit.

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 as a sum of consecutive naturals, namely, 322811351751 + 322811351752.

It is an arithmetic number, because the mean of its divisors is an integer number (322811351752).

Almost surely, 2^645622703503 is an apocalyptic number.

645622703503 is a deficient number, since it is larger than the sum of its proper divisors (1).

645622703503 is an equidigital number, since it uses as much as digits as its factorization.

645622703503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 43.

The spelling of 645622703503 in words is "six hundred forty-five billion, six hundred twenty-two million, seven hundred three thousand, five hundred three".