648206165 has 8 divisors (see below), whose sum is σ = 792524088. Its totient is φ = 508780480.

The previous prime is 648206159. The next prime is 648206189. The reversal of 648206165 is 561602846.

It can be written as a sum of positive squares in 4 ways, for example, as 87179569 + 561026596 = 9337^2 + 23686^2 .

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

It is not a de Polignac number, because 648206165 - 2⁴ = 648206149 is a prime.

It is a Duffinian number.

It is a congruent 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, 1222766 + ... + 1223295.

It is an arithmetic number, because the mean of its divisors is an integer number (99065511).

Almost surely, 2^648206165 is an apocalyptic number.

It is an amenable number.

648206165 is a deficient number, since it is larger than the sum of its proper divisors (144317923).

648206165 is a wasteful number, since it uses less digits than its factorization.

648206165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446119.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 648206165 is about 25459.8932637197. The cubic root of 648206165 is about 865.4415044852.

The spelling of 648206165 in words is "six hundred forty-eight million, two hundred six thousand, one hundred sixty-five".