64171340305 has 8 divisors (see below), whose sum is σ = 77768040744. Its totient is φ = 50828784000.

The previous prime is 64171340251. The next prime is 64171340309. The reversal of 64171340305 is 50304317146.

64171340305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4314781969 + 59856558336 = 65687^2 + 244656^2 .

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

It is not a de Polignac number, because 64171340305 - 2¹⁷ = 64171209233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64171340309) 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, 63535476 + ... + 63536485.

It is an arithmetic number, because the mean of its divisors is an integer number (9721005093).

Almost surely, 2^64171340305 is an apocalyptic number.

It is an amenable number.

64171340305 is a deficient number, since it is larger than the sum of its proper divisors (13596700439).

64171340305 is a wasteful number, since it uses less digits than its factorization.

64171340305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127072067.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 64171340305 in words is "sixty-four billion, one hundred seventy-one million, three hundred forty thousand, three hundred five".