647640152 has 16 divisors (see below), whose sum is σ = 1214611200. Its totient is φ = 323743840.

The previous prime is 647640121. The next prime is 647640163. The reversal of 647640152 is 251046746.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 44777 + ... + 57447.

It is an arithmetic number, because the mean of its divisors is an integer number (75913200).

Almost surely, 2^647640152 is an apocalyptic number.

It is an amenable number.

647640152 is a deficient number, since it is larger than the sum of its proper divisors (566971048).

647640152 is a wasteful number, since it uses less digits than its factorization.

647640152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19066 (or 19062 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 647640152 is about 25448.7750589297. The cubic root of 647640152 is about 865.1895302333.

Adding to 647640152 its reverse (251046746), we get a palindrome (898686898).

The spelling of 647640152 in words is "six hundred forty-seven million, six hundred forty thousand, one hundred fifty-two".