645164914 has 16 divisors (see below), whose sum is σ = 1017535320. Its totient is φ = 306351360.

The previous prime is 645164903. The next prime is 645164917. The reversal of 645164914 is 419461546.

It can be written as a sum of positive squares in 4 ways, for example, as 493062025 + 152102889 = 22205^2 + 12333^2 .

It is not an unprimeable number, because it can be changed into a prime (645164917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87639 + ... + 94714.

Almost surely, 2^645164914 is an apocalyptic number.

645164914 is a deficient number, since it is larger than the sum of its proper divisors (372370406).

645164914 is a wasteful number, since it uses less digits than its factorization.

645164914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182445.

The product of its digits is 103680, while the sum is 40.

The square root of 645164914 is about 25400.0967320993. The cubic root of 645164914 is about 864.0858905597.

The spelling of 645164914 in words is "six hundred forty-five million, one hundred sixty-four thousand, nine hundred fourteen".