645150530 has 16 divisors (see below), whose sum is σ = 1201315320. Its totient is φ = 249161472.

The previous prime is 645150521. The next prime is 645150533. The reversal of 645150530 is 35051546.

It can be written as a sum of positive squares in 4 ways, for example, as 441546169 + 203604361 = 21013^2 + 14269^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 645150493 and 645150502.

It is not an unprimeable number, because it can be changed into a prime (645150533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112039 + ... + 1112618.

Almost surely, 2^645150530 is an apocalyptic number.

645150530 is a deficient number, since it is larger than the sum of its proper divisors (556164790).

645150530 is a wasteful number, since it uses less digits than its factorization.

645150530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224693.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 645150530 is about 25399.8135819931. The cubic root of 645150530 is about 864.0794688921.

The spelling of 645150530 in words is "six hundred forty-five million, one hundred fifty thousand, five hundred thirty".