645500606 has 8 divisors (see below), whose sum is σ = 990768504. Its totient is φ = 315244440.

The previous prime is 645500599. The next prime is 645500657. The reversal of 645500606 is 606005546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 3752825 + ... + 3752996.

It is an arithmetic number, because the mean of its divisors is an integer number (123846063).

Almost surely, 2^645500606 is an apocalyptic number.

645500606 is a deficient number, since it is larger than the sum of its proper divisors (345267898).

645500606 is a wasteful number, since it uses less digits than its factorization.

645500606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7505866.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 645500606 is about 25406.7039578140. The cubic root of 645500606 is about 864.2357315382.

The spelling of 645500606 in words is "six hundred forty-five million, five hundred thousand, six hundred six".