645360005611 has 2 divisors, whose sum is σ = 645360005612. Its totient is φ = 645360005610.

The previous prime is 645360005593. The next prime is 645360005621. The reversal of 645360005611 is 116500063546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645360005611 - 2¹⁹ = 645359481323 is a prime.

It is not a weakly prime, because it can be changed into another prime (645360005621) 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, 322680002805 + 322680002806.

It is an arithmetic number, because the mean of its divisors is an integer number (322680002806).

Almost surely, 2^645360005611 is an apocalyptic number.

645360005611 is a deficient number, since it is larger than the sum of its proper divisors (1).

645360005611 is an equidigital number, since it uses as much as digits as its factorization.

645360005611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 645360005611 in words is "six hundred forty-five billion, three hundred sixty million, five thousand, six hundred eleven".