65505571172016 has 80 divisors (see below), whose sum is σ = 170378030227200. Its totient is φ = 21686177606400.

The previous prime is 65505571172003. The next prime is 65505571172057. The reversal of 65505571172016 is 61027117550556.

It is a self number, because there is not a number n which added to its sum of digits gives 65505571172016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34838335 + ... + 36670433.

It is an arithmetic number, because the mean of its divisors is an integer number (2129725377840).

Almost surely, 2^{65505571172016} is an apocalyptic number.

It is an amenable number.

65505571172016 is an abundant number, since it is smaller than the sum of its proper divisors (104872459055184).

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

65505571172016 is a wasteful number, since it uses less digits than its factorization.

65505571172016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837194 (or 1837188 counting only the distinct ones).

The product of its (nonzero) digits is 2205000, while the sum is 51.

The spelling of 65505571172016 in words is "sixty-five trillion, five hundred five billion, five hundred seventy-one million, one hundred seventy-two thousand, sixteen".