64408715321 has 8 divisors (see below), whose sum is σ = 67236005760. Its totient is φ = 61583667552.

The previous prime is 64408715317. The next prime is 64408715323. The reversal of 64408715321 is 12351780446.

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 64408715321 - 2² = 64408715317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64408715323) by changing a digit.

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, 501836 + ... + 616973.

It is an arithmetic number, because the mean of its divisors is an integer number (8404500720).

Almost surely, 2^64408715321 is an apocalyptic number.

It is an amenable number.

64408715321 is a deficient number, since it is larger than the sum of its proper divisors (2827290439).

64408715321 is a wasteful number, since it uses less digits than its factorization.

64408715321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121335.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 64408715321 in words is "sixty-four billion, four hundred eight million, seven hundred fifteen thousand, three hundred twenty-one".