641407161 has 8 divisors (see below), whose sum is σ = 905516064. Its totient is φ = 402451520.

The previous prime is 641407159. The next prime is 641407163. The reversal of 641407161 is 161704146.

641407161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (641407159) and next prime (641407163).

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 641407161 - 2¹ = 641407159 is a prime.

It is a super-2 number, since 2×641407161² = 822806292364159842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641407163) 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, 6288255 + ... + 6288356.

It is an arithmetic number, because the mean of its divisors is an integer number (113189508).

Almost surely, 2^641407161 is an apocalyptic number.

It is an amenable number.

641407161 is a deficient number, since it is larger than the sum of its proper divisors (264108903).

641407161 is a wasteful number, since it uses less digits than its factorization.

641407161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12576631.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 641407161 is about 25326.0174721570. The cubic root of 641407161 is about 862.4050046185.

The spelling of 641407161 in words is "six hundred forty-one million, four hundred seven thousand, one hundred sixty-one".