646613041 has 4 divisors (see below), whose sum is σ = 647230500. Its totient is φ = 645995584.

The previous prime is 646613027. The next prime is 646613057. The reversal of 646613041 is 140316646.

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 544522225 + 102090816 = 23335^2 + 10104^2 .

It is a cyclic number.

It is not a de Polignac number, because 646613041 - 2¹⁵ = 646580273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646612994 and 646613012.

It is not an unprimeable number, because it can be changed into a prime (646613941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307156 + ... + 309253.

It is an arithmetic number, because the mean of its divisors is an integer number (161807625).

Almost surely, 2^646613041 is an apocalyptic number.

It is an amenable number.

646613041 is a deficient number, since it is larger than the sum of its proper divisors (617459).

646613041 is a wasteful number, since it uses less digits than its factorization.

646613041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617458.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 646613041 is about 25428.5870822584. The cubic root of 646613041 is about 864.7319119755.

Adding to 646613041 its reverse (140316646), we get a palindrome (786929687).

The spelling of 646613041 in words is "six hundred forty-six million, six hundred thirteen thousand, forty-one".