64873161 has 6 divisors (see below), whose sum is σ = 93705690. Its totient is φ = 43248768.

The previous prime is 64873157. The next prime is 64873223. The reversal of 64873161 is 16137846.

64873161 is a `hidden beast` number, since 648 + 7 + 3 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50765625 + 14107536 = 7125^2 + 3756^2 .

It is not a de Polignac number, because 64873161 - 2² = 64873157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64873121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3604056 + ... + 3604073.

It is an arithmetic number, because the mean of its divisors is an integer number (15617615).

Almost surely, 2^64873161 is an apocalyptic number.

It is an amenable number.

64873161 is a deficient number, since it is larger than the sum of its proper divisors (28832529).

64873161 is a wasteful number, since it uses less digits than its factorization.

64873161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7208135 (or 7208132 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 64873161 is about 8054.3876862242. The cubic root of 64873161 is about 401.8108748756.

The spelling of 64873161 in words is "sixty-four million, eight hundred seventy-three thousand, one hundred sixty-one".