64171340321 has 8 divisors (see below), whose sum is σ = 70007218464. Its totient is φ = 58335815520.

The previous prime is 64171340309. The next prime is 64171340339. The reversal of 64171340321 is 12304317146.

64171340321 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 64171340321 - 2¹⁸ = 64171078177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64171340351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417245 + ... + 549941.

It is an arithmetic number, because the mean of its divisors is an integer number (8750902308).

Almost surely, 2^64171340321 is an apocalyptic number.

It is an amenable number.

64171340321 is a deficient number, since it is larger than the sum of its proper divisors (5835878143).

64171340321 is a wasteful number, since it uses less digits than its factorization.

64171340321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176671.

The product of its (nonzero) digits is 12096, while the sum is 32.

Adding to 64171340321 its reverse (12304317146), we get a palindrome (76475657467).

The spelling of 64171340321 in words is "sixty-four billion, one hundred seventy-one million, three hundred forty thousand, three hundred twenty-one".