641526161 has 8 divisors (see below), whose sum is σ = 679509504. Its totient is φ = 603570240.

The previous prime is 641526157. The next prime is 641526167. The reversal of 641526161 is 161625146.

641526161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 641526161 - 2² = 641526157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641526167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60056 + ... + 69926.

It is an arithmetic number, because the mean of its divisors is an integer number (84938688).

Almost surely, 2^641526161 is an apocalyptic number.

It is an amenable number.

641526161 is a deficient number, since it is larger than the sum of its proper divisors (37983343).

641526161 is a wasteful number, since it uses less digits than its factorization.

641526161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13711.

The product of its digits is 8640, while the sum is 32.

The square root of 641526161 is about 25328.3667258669. The cubic root of 641526161 is about 862.4583351994.

The spelling of 641526161 in words is "six hundred forty-one million, five hundred twenty-six thousand, one hundred sixty-one".