64386725209 has 8 divisors (see below), whose sum is σ = 68397296000. Its totient is φ = 60438334032.

The previous prime is 64386725201. The next prime is 64386725237. The reversal of 64386725209 is 90252768346.

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 64386725209 - 2³ = 64386725201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64386725201) 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, 15542769 + ... + 15546910.

It is an arithmetic number, because the mean of its divisors is an integer number (8549662000).

Almost surely, 2^64386725209 is an apocalyptic number.

It is an amenable number.

64386725209 is a deficient number, since it is larger than the sum of its proper divisors (4010570791).

64386725209 is a wasteful number, since it uses less digits than its factorization.

64386725209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31089807.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 64386725209 in words is "sixty-four billion, three hundred eighty-six million, seven hundred twenty-five thousand, two hundred nine".