64567161 has 6 divisors (see below), whose sum is σ = 93263690. Its totient is φ = 43044768.

The previous prime is 64567133. The next prime is 64567171. The reversal of 64567161 is 16176546.

64567161 is a `hidden beast` number, since 645 + 6 + 7 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 33698025 + 30869136 = 5805^2 + 5556^2 .

It is not a de Polignac number, because 64567161 - 2¹⁴ = 64550777 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (64567171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3587056 + ... + 3587073.

Almost surely, 2^64567161 is an apocalyptic number.

It is an amenable number.

64567161 is a deficient number, since it is larger than the sum of its proper divisors (28696529).

64567161 is a wasteful number, since it uses less digits than its factorization.

64567161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174135 (or 7174132 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 64567161 is about 8035.3693754550. The cubic root of 64567161 is about 401.1781121396.

The spelling of 64567161 in words is "sixty-four million, five hundred sixty-seven thousand, one hundred sixty-one".