64161971 has 8 divisors (see below), whose sum is σ = 66338688. Its totient is φ = 61992000.

The previous prime is 64161943. The next prime is 64161989. The reversal of 64161971 is 17916146.

64161971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64161971 - 2¹⁰ = 64160947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64161931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24191 + ... + 26711.

It is an arithmetic number, because the mean of its divisors is an integer number (8292336).

Almost surely, 2^64161971 is an apocalyptic number.

64161971 is a deficient number, since it is larger than the sum of its proper divisors (2176717).

64161971 is a wasteful number, since it uses less digits than its factorization.

64161971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373.

The product of its digits is 9072, while the sum is 35.

The square root of 64161971 is about 8010.1167906592. The cubic root of 64161971 is about 400.3371553192.

The spelling of 64161971 in words is "sixty-four million, one hundred sixty-one thousand, nine hundred seventy-one".