64317337768 has 8 divisors (see below), whose sum is σ = 120595008330. Its totient is φ = 32158668880.

The previous prime is 64317337739. The next prime is 64317337783. The reversal of 64317337768 is 86773371346.

It can be written as a sum of positive squares in only one way, i.e., 59791008484 + 4526329284 = 244522^2 + 67278^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4019833603 + ... + 4019833618.

Almost surely, 2^64317337768 is an apocalyptic number.

It is an amenable number.

64317337768 is a deficient number, since it is larger than the sum of its proper divisors (56277670562).

64317337768 is a wasteful number, since it uses less digits than its factorization.

64317337768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8039667227 (or 8039667223 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 55.

The spelling of 64317337768 in words is "sixty-four billion, three hundred seventeen million, three hundred thirty-seven thousand, seven hundred sixty-eight".