64655303668 has 6 divisors (see below), whose sum is σ = 113146781426. Its totient is φ = 32327651832.

The previous prime is 64655303653. The next prime is 64655303681. The reversal of 64655303668 is 86630355646.

It can be written as a sum of positive squares in only one way, i.e., 42724063204 + 21931240464 = 206698^2 + 148092^2 .

It is a congruent number.

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, 8081912955 + ... + 8081912962.

Almost surely, 2^64655303668 is an apocalyptic number.

It is an amenable number.

64655303668 is a deficient number, since it is larger than the sum of its proper divisors (48491477758).

64655303668 is a wasteful number, since it uses less digits than its factorization.

64655303668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16163825921 (or 16163825919 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 52.

The spelling of 64655303668 in words is "sixty-four billion, six hundred fifty-five million, three hundred three thousand, six hundred sixty-eight".