645750484601 has 2 divisors, whose sum is σ = 645750484602. Its totient is φ = 645750484600.

The previous prime is 645750484597. The next prime is 645750484663. The reversal of 645750484601 is 106484057546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429175663225 + 216574821376 = 655115^2 + 465376^2 .

It is a cyclic number.

It is not a de Polignac number, because 645750484601 - 2² = 645750484597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645750484601.

It is not a weakly prime, because it can be changed into another prime (645750484501) 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 as a sum of consecutive naturals, namely, 322875242300 + 322875242301.

It is an arithmetic number, because the mean of its divisors is an integer number (322875242301).

Almost surely, 2^645750484601 is an apocalyptic number.

It is an amenable number.

645750484601 is a deficient number, since it is larger than the sum of its proper divisors (1).

645750484601 is an equidigital number, since it uses as much as digits as its factorization.

645750484601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 645750484601 in words is "six hundred forty-five billion, seven hundred fifty million, four hundred eighty-four thousand, six hundred one".