645301012 has 6 divisors (see below), whose sum is σ = 1129276778. Its totient is φ = 322650504.

The previous prime is 645301003. The next prime is 645301021. The reversal of 645301012 is 210103546.

It is an interprime number because it is at equal distance from previous prime (645301003) and next prime (645301021).

It can be written as a sum of positive squares in only one way, i.e., 372258436 + 273042576 = 19294^2 + 16524^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80662623 + ... + 80662630.

Almost surely, 2^645301012 is an apocalyptic number.

It is an amenable number.

645301012 is a deficient number, since it is larger than the sum of its proper divisors (483975766).

645301012 is a wasteful number, since it uses less digits than its factorization.

645301012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161325257 (or 161325255 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 645301012 is about 25402.7756751108. The cubic root of 645301012 is about 864.1466461332.

Adding to 645301012 its reverse (210103546), we get a palindrome (855404558).

The spelling of 645301012 in words is "six hundred forty-five million, three hundred one thousand, twelve".