645214451033 has 2 divisors, whose sum is σ = 645214451034. Its totient is φ = 645214451032.

The previous prime is 645214450999. The next prime is 645214451039. The reversal of 645214451033 is 330154412546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490900613449 + 154313837584 = 700643^2 + 392828^2 .

It is a cyclic number.

It is not a de Polignac number, because 645214451033 - 2¹² = 645214446937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (645214451039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322607225516 + 322607225517.

It is an arithmetic number, because the mean of its divisors is an integer number (322607225517).

Almost surely, 2^645214451033 is an apocalyptic number.

It is an amenable number.

645214451033 is a deficient number, since it is larger than the sum of its proper divisors (1).

645214451033 is an equidigital number, since it uses as much as digits as its factorization.

645214451033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 645214451033 its reverse (330154412546), we get a palindrome (975368863579).

The spelling of 645214451033 in words is "six hundred forty-five billion, two hundred fourteen million, four hundred fifty-one thousand, thirty-three".