647920459210 has 8 divisors (see below), whose sum is σ = 1166256826596. Its totient is φ = 259168183680.

The previous prime is 647920459169. The next prime is 647920459261. The reversal of 647920459210 is 12954029746.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 647617734009 + 302725201 = 804747^2 + 17399^2 .

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

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, 32396022951 + ... + 32396022970.

Almost surely, 2^647920459210 is an apocalyptic number.

647920459210 is a deficient number, since it is larger than the sum of its proper divisors (518336367386).

647920459210 is a wasteful number, since it uses less digits than its factorization.

647920459210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64792045928.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 647920459210 in words is "six hundred forty-seven billion, nine hundred twenty million, four hundred fifty-nine thousand, two hundred ten".