64641161 has 8 divisors (see below), whose sum is σ = 70265664. Its totient is φ = 59109840.

The previous prime is 64641149. The next prime is 64641163. The reversal of 64641161 is 16114646.

64641161 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 a de Polignac number, because none of the positive numbers 2^k-64641161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64641163) 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 7 ways as a sum of consecutive naturals, for example, 21845 + ... + 24626.

It is an arithmetic number, because the mean of its divisors is an integer number (8783208).

Almost surely, 2^64641161 is an apocalyptic number.

It is an amenable number.

64641161 is a deficient number, since it is larger than the sum of its proper divisors (5624503).

64641161 is a wasteful number, since it uses less digits than its factorization.

64641161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46591.

The product of its digits is 3456, while the sum is 29.

The square root of 64641161 is about 8039.9726989586. The cubic root of 64641161 is about 401.3313161606.

The spelling of 64641161 in words is "sixty-four million, six hundred forty-one thousand, one hundred sixty-one".