646107041 has 4 divisors (see below), whose sum is σ = 646906500. Its totient is φ = 645307584.

The previous prime is 646107017. The next prime is 646107067. The reversal of 646107041 is 140701646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140701646 = 2 ⋅70350823.

It can be written as a sum of positive squares in 2 ways, for example, as 522808225 + 123298816 = 22865^2 + 11104^2 .

It is a cyclic number.

It is not a de Polignac number, because 646107041 - 2⁶ = 646106977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646106995 and 646107013.

It is not an unprimeable number, because it can be changed into a prime (646107001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398516 + ... + 400133.

It is an arithmetic number, because the mean of its divisors is an integer number (161726625).

Almost surely, 2^646107041 is an apocalyptic number.

It is an amenable number.

646107041 is a deficient number, since it is larger than the sum of its proper divisors (799459).

646107041 is an equidigital number, since it uses as much as digits as its factorization.

646107041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799458.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 646107041 is about 25418.6357029641. The cubic root of 646107041 is about 864.5062909297.

Adding to 646107041 its reverse (140701646), we get a palindrome (786808687).

The spelling of 646107041 in words is "six hundred forty-six million, one hundred seven thousand, forty-one".