645545006 has 8 divisors (see below), whose sum is σ = 968867760. Its totient is φ = 322589088.

The previous prime is 645544987. The next prime is 645545027. The reversal of 645545006 is 600545546.

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

It is a Curzon number.

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, 87266 + ... + 94373.

It is an arithmetic number, because the mean of its divisors is an integer number (121108470).

Almost surely, 2^645545006 is an apocalyptic number.

645545006 is a deficient number, since it is larger than the sum of its proper divisors (323322754).

645545006 is a wasteful number, since it uses less digits than its factorization.

645545006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183418.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 645545006 is about 25407.5777279142. The cubic root of 645545006 is about 864.2555462301.

The spelling of 645545006 in words is "six hundred forty-five million, five hundred forty-five thousand, six".