64171011 has 4 divisors (see below), whose sum is σ = 85561352. Its totient is φ = 42780672.

The previous prime is 64170991. The next prime is 64171021. The reversal of 64171011 is 11017146.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64171011 - 2⁹ = 64170499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64171021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10695166 + ... + 10695171.

It is an arithmetic number, because the mean of its divisors is an integer number (21390338).

Almost surely, 2^64171011 is an apocalyptic number.

64171011 is a deficient number, since it is larger than the sum of its proper divisors (21390341).

64171011 is a wasteful number, since it uses less digits than its factorization.

64171011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21390340.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 64171011 is about 8010.6810571886. The cubic root of 64171011 is about 400.3559560609.

Adding to 64171011 its reverse (11017146), we get a palindrome (75188157).

The spelling of 64171011 in words is "sixty-four million, one hundred seventy-one thousand, eleven".