61864171 has 8 divisors (see below), whose sum is σ = 65483600. Its totient is φ = 58281120.

The previous prime is 61864157. The next prime is 61864177. The reversal of 61864171 is 17146816.

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-61864171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61864177) 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 7 ways as a sum of consecutive naturals, for example, 5556 + ... + 12433.

It is an arithmetic number, because the mean of its divisors is an integer number (8185450).

Almost surely, 2^61864171 is an apocalyptic number.

61864171 is a deficient number, since it is larger than the sum of its proper divisors (3619429).

61864171 is a wasteful number, since it uses less digits than its factorization.

61864171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18189.

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

The square root of 61864171 is about 7865.3779947311. The cubic root of 61864171 is about 395.4999192879.

The spelling of 61864171 in words is "sixty-one million, eight hundred sixty-four thousand, one hundred seventy-one".