64861171 has 4 divisors (see below), whose sum is σ = 68676552. Its totient is φ = 61045792.

The previous prime is 64861141. The next prime is 64861183. The reversal of 64861171 is 17116846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17116846 = 2 ⋅8558423.

It is a cyclic number.

It is not a de Polignac number, because 64861171 - 2¹³ = 64852979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64861141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1907665 + ... + 1907698.

It is an arithmetic number, because the mean of its divisors is an integer number (17169138).

Almost surely, 2^64861171 is an apocalyptic number.

64861171 is a deficient number, since it is larger than the sum of its proper divisors (3815381).

64861171 is a wasteful number, since it uses less digits than its factorization.

64861171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3815380.

The product of its digits is 8064, while the sum is 34.

The square root of 64861171 is about 8053.6433370246. The cubic root of 64861171 is about 401.7861188278.

The spelling of 64861171 in words is "sixty-four million, eight hundred sixty-one thousand, one hundred seventy-one".