645460016 has 10 divisors (see below), whose sum is σ = 1250578812. Its totient is φ = 322730000.

The previous prime is 645460003. The next prime is 645460027. The reversal of 645460016 is 610064546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20170610 + ... + 20170641.

Almost surely, 2^645460016 is an apocalyptic number.

It is an amenable number.

645460016 is a deficient number, since it is larger than the sum of its proper divisors (605118796).

645460016 is a wasteful number, since it uses less digits than its factorization.

645460016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40341259 (or 40341253 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 645460016 is about 25405.9051403409. The cubic root of 645460016 is about 864.2176163662.

The spelling of 645460016 in words is "six hundred forty-five million, four hundred sixty thousand, sixteen".