645053562 has 24 divisors (see below), whose sum is σ = 1402093524. Its totient is φ = 214329024.

The previous prime is 645053551. The next prime is 645053567. The reversal of 645053562 is 265350546.

It is a happy number.

645053562 is a `hidden beast` number, since 6 + 45 + 0 + 53 + 562 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 471367521 + 173686041 = 21711^2 + 13179^2 .

It is not an unprimeable number, because it can be changed into a prime (645053567) 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 11 ways as a sum of consecutive naturals, for example, 51613 + ... + 62880.

Almost surely, 2^645053562 is an apocalyptic number.

645053562 is an abundant number, since it is smaller than the sum of its proper divisors (757039962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645053562 is a wasteful number, since it uses less digits than its factorization.

645053562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114814 (or 114811 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 645053562 is about 25397.9046773548. The cubic root of 645053562 is about 864.0361755044.

The spelling of 645053562 in words is "six hundred forty-five million, fifty-three thousand, five hundred sixty-two".