641140705 has 8 divisors (see below), whose sum is σ = 769645800. Its totient is φ = 512727936.

The previous prime is 641140679. The next prime is 641140733. The reversal of 641140705 is 507041146.

641140705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 73891216 + 567249489 = 8596^2 + 23817^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641140705 - 2⁵ = 641140673 is a prime.

It is a super-2 number, since 2×641140705² = 822122807215794050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6750 + ... + 36439.

It is an arithmetic number, because the mean of its divisors is an integer number (96205725).

Almost surely, 2^641140705 is an apocalyptic number.

It is an amenable number.

641140705 is a deficient number, since it is larger than the sum of its proper divisors (128505095).

641140705 is a wasteful number, since it uses less digits than its factorization.

641140705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46163.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 641140705 is about 25320.7564065531. The cubic root of 641140705 is about 862.2855668002.

The spelling of 641140705 in words is "six hundred forty-one million, one hundred forty thousand, seven hundred five".