64441161 has 24 divisors (see below), whose sum is σ = 98908680. Its totient is φ = 40352256.

The previous prime is 64441151. The next prime is 64441171. The reversal of 64441161 is 16114446.

64441161 is a `hidden beast` number, since 64 + 441 + 161 = 666.

It is an interprime number because it is at equal distance from previous prime (64441151) and next prime (64441171).

It can be written as a sum of positive squares in 4 ways, for example, as 6969600 + 57471561 = 2640^2 + 7581^2 .

It is not a de Polignac number, because 64441161 - 2¹³ = 64432969 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64441151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6321 + ... + 12993.

It is an arithmetic number, because the mean of its divisors is an integer number (4121195).

Almost surely, 2^64441161 is an apocalyptic number.

It is an amenable number.

64441161 is a deficient number, since it is larger than the sum of its proper divisors (34467519).

64441161 is a wasteful number, since it uses less digits than its factorization.

64441161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6745 (or 6742 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 64441161 is about 8027.5252101753. The cubic root of 64441161 is about 400.9169816718.

The spelling of 64441161 in words is "sixty-four million, four hundred forty-one thousand, one hundred sixty-one".