645813602 has 16 divisors (see below), whose sum is σ = 1107943872. Its totient is φ = 276568560.

The previous prime is 645813583. The next prime is 645813617. The reversal of 645813602 is 206318546.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2633 + ... + 36035.

It is an arithmetic number, because the mean of its divisors is an integer number (69246492).

Almost surely, 2^645813602 is an apocalyptic number.

645813602 is a deficient number, since it is larger than the sum of its proper divisors (462130270).

645813602 is a wasteful number, since it uses less digits than its factorization.

645813602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34793.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 645813602 is about 25412.8629241178. The cubic root of 645813602 is about 864.3753950362.

The spelling of 645813602 in words is "six hundred forty-five million, eight hundred thirteen thousand, six hundred two".