645474352 has 20 divisors (see below), whose sum is σ = 1251198936. Its totient is φ = 322584320.

The previous prime is 645474311. The next prime is 645474383. The reversal of 645474352 is 253474546.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30327 + ... + 47017.

Almost surely, 2^645474352 is an apocalyptic number.

It is an amenable number.

645474352 is a deficient number, since it is larger than the sum of its proper divisors (605724584).

645474352 is a wasteful number, since it uses less digits than its factorization.

645474352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19116 (or 19110 counting only the distinct ones).

The product of its digits is 403200, while the sum is 40.

The square root of 645474352 is about 25406.1872779054. The cubic root of 645474352 is about 864.2240145585.

The spelling of 645474352 in words is "six hundred forty-five million, four hundred seventy-four thousand, three hundred fifty-two".