64353642171 has 128 divisors (see below), whose sum is σ = 115787169792. Its totient is φ = 30820608000.

The previous prime is 64353642169. The next prime is 64353642179. The reversal of 64353642171 is 17124635346.

It is not a de Polignac number, because 64353642171 - 2¹ = 64353642169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64353642179) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 70640206 + ... + 70641116.

It is an arithmetic number, because the mean of its divisors is an integer number (904587264).

Almost surely, 2^64353642171 is an apocalyptic number.

64353642171 is a deficient number, since it is larger than the sum of its proper divisors (51433527621).

64353642171 is a wasteful number, since it uses less digits than its factorization.

64353642171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473.

The product of its digits is 362880, while the sum is 42.

The spelling of 64353642171 in words is "sixty-four billion, three hundred fifty-three million, six hundred forty-two thousand, one hundred seventy-one".