64323603517 has 8 divisors (see below), whose sum is σ = 64745076312. Its totient is φ = 63902280000.

The previous prime is 64323603493. The next prime is 64323603557. The reversal of 64323603517 is 71530632346.

It can be written as a sum of positive squares in 4 ways, for example, as 7094524441 + 57229079076 = 84229^2 + 239226^2 .

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 64323603517 - 2³⁵ = 29963865149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64323603517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64323603557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 904767 + ... + 973267.

It is an arithmetic number, because the mean of its divisors is an integer number (8093134539).

Almost surely, 2^64323603517 is an apocalyptic number.

It is an amenable number.

64323603517 is a deficient number, since it is larger than the sum of its proper divisors (421472795).

64323603517 is a wasteful number, since it uses less digits than its factorization.

64323603517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74639.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 64323603517 in words is "sixty-four billion, three hundred twenty-three million, six hundred three thousand, five hundred seventeen".