641670311 has 16 divisors (see below), whose sum is σ = 665487360. Its totient is φ = 618377760.

The previous prime is 641670301. The next prime is 641670313. The reversal of 641670311 is 113076146.

It is a cyclic number.

It is not a de Polignac number, because 641670311 - 2¹⁴ = 641653927 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 (641670313) 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 15 ways as a sum of consecutive naturals, for example, 1385666 + ... + 1386128.

It is an arithmetic number, because the mean of its divisors is an integer number (41592960).

Almost surely, 2^641670311 is an apocalyptic number.

641670311 is a deficient number, since it is larger than the sum of its proper divisors (23817049).

641670311 is a wasteful number, since it uses less digits than its factorization.

641670311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 641670311 is about 25331.2121897078. The cubic root of 641670311 is about 862.5229280749.

The spelling of 641670311 in words is "six hundred forty-one million, six hundred seventy thousand, three hundred eleven".