65111772216 has 64 divisors (see below), whose sum is σ = 172817172000. Its totient is φ = 20372410368.

The previous prime is 65111772211. The next prime is 65111772217. The reversal of 65111772216 is 61227711156.

It is a super-2 number, since 2×65111772216² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65111772211) by changing a digit.

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, 61741 + ... + 366108.

Almost surely, 2^65111772216 is an apocalyptic number.

It is an amenable number.

65111772216 is an abundant number, since it is smaller than the sum of its proper divisors (107705399784).

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

65111772216 is a wasteful number, since it uses less digits than its factorization.

65111772216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428248 (or 428244 counting only the distinct ones).

The product of its digits is 35280, while the sum is 39.

The spelling of 65111772216 in words is "sixty-five billion, one hundred eleven million, seven hundred seventy-two thousand, two hundred sixteen".