648601061 has 4 divisors (see below), whose sum is σ = 649454124. Its totient is φ = 647748000.

The previous prime is 648601039. The next prime is 648601087. The reversal of 648601061 is 160106846.

It is a happy number.

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 195720100 + 452880961 = 13990^2 + 21281^2 .

It is a cyclic number.

It is not a de Polignac number, because 648601061 - 2¹⁰ = 648600037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648601001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425390 + ... + 426911.

It is an arithmetic number, because the mean of its divisors is an integer number (162363531).

Almost surely, 2^648601061 is an apocalyptic number.

It is an amenable number.

648601061 is a deficient number, since it is larger than the sum of its proper divisors (853063).

648601061 is an equidigital number, since it uses as much as digits as its factorization.

648601061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853062.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 648601061 is about 25467.6473393205. The cubic root of 648601061 is about 865.6172150481.

The spelling of 648601061 in words is "six hundred forty-eight million, six hundred one thousand, sixty-one".