645524050 has 48 divisors (see below), whose sum is σ = 1307505600. Its totient is φ = 236174400.

The previous prime is 645523997. The next prime is 645524053. The reversal of 645524050 is 50425546.

It is not an unprimeable number, because it can be changed into a prime (645524053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15835 + ... + 39265.

It is an arithmetic number, because the mean of its divisors is an integer number (27239700).

Almost surely, 2^645524050 is an apocalyptic number.

645524050 is an abundant number, since it is smaller than the sum of its proper divisors (661981550).

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

645524050 is a wasteful number, since it uses less digits than its factorization.

645524050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23491 (or 23486 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 645524050 is about 25407.1653279149. The cubic root of 645524050 is about 864.2461941658.

Adding to 645524050 its reverse (50425546), we get a palindrome (695949596).

The spelling of 645524050 in words is "six hundred forty-five million, five hundred twenty-four thousand, fifty".