646580041 has 4 divisors (see below), whose sum is σ = 650192400. Its totient is φ = 642967684.

The previous prime is 646580029. The next prime is 646580047. The reversal of 646580041 is 140085646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 646580041 - 2⁵ = 646580009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646579979 and 646580006.

It is not an unprimeable number, because it can be changed into a prime (646580047) 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, 1805911 + ... + 1806268.

It is an arithmetic number, because the mean of its divisors is an integer number (162548100).

Almost surely, 2^646580041 is an apocalyptic number.

It is an amenable number.

646580041 is a deficient number, since it is larger than the sum of its proper divisors (3612359).

646580041 is a wasteful number, since it uses less digits than its factorization.

646580041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612358.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 646580041 is about 25427.9381979743. The cubic root of 646580041 is about 864.7172011480.

The spelling of 646580041 in words is "six hundred forty-six million, five hundred eighty thousand, forty-one".