65005215560 has 64 divisors (see below), whose sum is σ = 153201818880. Its totient is φ = 24776899840.

The previous prime is 65005215551. The next prime is 65005215601. The reversal of 65005215560 is 6551250056.

It is a super-3 number, since 3×65005215560³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 65005215560.

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 in 15 ways as a sum of consecutive naturals, for example, 107630 + ... + 376290.

It is an arithmetic number, because the mean of its divisors is an integer number (2393778420).

Almost surely, 2^65005215560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65005215560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76600909440).

65005215560 is an abundant number, since it is smaller than the sum of its proper divisors (88196603320).

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

65005215560 is a wasteful number, since it uses less digits than its factorization.

65005215560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268958 (or 268954 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 65005215560 in words is "sixty-five billion, five million, two hundred fifteen thousand, five hundred sixty".