64165880309 has 8 divisors (see below), whose sum is σ = 67569976320. Its totient is φ = 60812973936.

The previous prime is 64165880291. The next prime is 64165880377. The reversal of 64165880309 is 90308856146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64165880309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64161880309) 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, 12794837 + ... + 12799850.

It is an arithmetic number, because the mean of its divisors is an integer number (8446247040).

Almost surely, 2^64165880309 is an apocalyptic number.

It is an amenable number.

64165880309 is a deficient number, since it is larger than the sum of its proper divisors (3404096011).

64165880309 is a wasteful number, since it uses less digits than its factorization.

64165880309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25594819.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 64165880309 in words is "sixty-four billion, one hundred sixty-five million, eight hundred eighty thousand, three hundred nine".