641817041 has 4 divisors (see below), whose sum is σ = 641932800. Its totient is φ = 641701284.

The previous prime is 641817037. The next prime is 641817073. The reversal of 641817041 is 140718146.

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 641817041 - 2² = 641817037 is a prime.

It is a super-2 number, since 2×641817041² = 823858228235991362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641816989 and 641817007.

It is not an unprimeable number, because it can be changed into a prime (641817641) 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, 49121 + ... + 60798.

It is an arithmetic number, because the mean of its divisors is an integer number (160483200).

Almost surely, 2^641817041 is an apocalyptic number.

It is an amenable number.

641817041 is a deficient number, since it is larger than the sum of its proper divisors (115759).

641817041 is a wasteful number, since it uses less digits than its factorization.

641817041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115758.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 641817041 is about 25334.1082534989. The cubic root of 641817041 is about 862.5886671010.

The spelling of 641817041 in words is "six hundred forty-one million, eight hundred seventeen thousand, forty-one".