65155440459664 has 45 divisors (see below), whose sum is σ = 128155201824027. Its totient is φ = 32090420109792.

The previous prime is 65155440459643. The next prime is 65155440459751. The reversal of 65155440459664 is 46695404455156.

The square root of 65155440459664 is 8071892.

It is a perfect power (a square), and thus also a powerful number.

65155440459664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65155440459664² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65155440459596 and 65155440459605.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 2163251997 + ... + 2163282115.

Almost surely, 2^{65155440459664} is an apocalyptic number.

65155440459664 is the 8071892-nd square number.

It is an amenable number.

65155440459664 is a deficient number, since it is larger than the sum of its proper divisors (62999761364363).

65155440459664 is an frugal number, since it uses more digits than its factorization.

65155440459664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60380 (or 30188 counting only the distinct ones).

The product of its (nonzero) digits is 311040000, while the sum is 64.

The spelling of 65155440459664 in words is "sixty-five trillion, one hundred fifty-five billion, four hundred forty million, four hundred fifty-nine thousand, six hundred sixty-four".