645150532 has 12 divisors (see below), whose sum is σ = 1215860716. Its totient is φ = 297761760.

The previous prime is 645150521. The next prime is 645150533. The reversal of 645150532 is 235051546.

It can be written as a sum of positive squares in 2 ways, for example, as 200109316 + 445041216 = 14146^2 + 21096^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 645150494 and 645150503.

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 3 ways as a sum of consecutive naturals, for example, 6203319 + ... + 6203422.

Almost surely, 2^645150532 is an apocalyptic number.

It is an amenable number.

645150532 is a deficient number, since it is larger than the sum of its proper divisors (570710184).

645150532 is a wasteful number, since it uses less digits than its factorization.

645150532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12406758 (or 12406756 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 645150532 is about 25399.8136213634. The cubic root of 645150532 is about 864.0794697850.

The spelling of 645150532 in words is "six hundred forty-five million, one hundred fifty thousand, five hundred thirty-two".