64171394480 has 40 divisors (see below), whose sum is σ = 149235549504. Its totient is φ = 25662182400.

The previous prime is 64171394477. The next prime is 64171394491. The reversal of 64171394480 is 8449317146.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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, 231320 + ... + 426440.

Almost surely, 2^64171394480 is an apocalyptic number.

It is an amenable number.

64171394480 is an abundant number, since it is smaller than the sum of its proper divisors (85064155024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64171394480 is a wasteful number, since it uses less digits than its factorization.

64171394480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199245 (or 199239 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 64171394480 in words is "sixty-four billion, one hundred seventy-one million, three hundred ninety-four thousand, four hundred eighty".