648113201 has 4 divisors (see below), whose sum is σ = 665629812. Its totient is φ = 630596592.

The previous prime is 648113173. The next prime is 648113209. The reversal of 648113201 is 102311846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 537126976 + 110986225 = 23176^2 + 10535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648113201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648113209) by changing a digit.

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, 8758250 + ... + 8758323.

It is an arithmetic number, because the mean of its divisors is an integer number (166407453).

Almost surely, 2^648113201 is an apocalyptic number.

It is an amenable number.

648113201 is a deficient number, since it is larger than the sum of its proper divisors (17516611).

648113201 is a wasteful number, since it uses less digits than its factorization.

648113201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17516610.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 648113201 is about 25458.0675032493. The cubic root of 648113201 is about 865.4001294028.

The spelling of 648113201 in words is "six hundred forty-eight million, one hundred thirteen thousand, two hundred one".