65520718560 has 480 divisors, whose sum is σ = 253643920992. Its totient is φ = 15796408320.

The previous prime is 65520718537. The next prime is 65520718573. The reversal of 65520718560 is 6581702556.

65520718560 is a `hidden beast` number, since 6 + 5 + 520 + 71 + 8 + 56 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 28083154 + ... + 28085486.

Almost surely, 2^65520718560 is an apocalyptic number.

65520718560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65520718560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126821960496).

65520718560 is an abundant number, since it is smaller than the sum of its proper divisors (188123202432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65520718560 is a wasteful number, since it uses less digits than its factorization.

65520718560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568 (or 2551 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 65520718560 in words is "sixty-five billion, five hundred twenty million, seven hundred eighteen thousand, five hundred sixty".