65945788416 has 560 divisors, whose sum is σ = 214093044000. Its totient is φ = 20164902912.

The previous prime is 65945788367. The next prime is 65945788421. The reversal of 65945788416 is 61488754956.

65945788416 is a `hidden beast` number, since 6 + 5 + 94 + 57 + 88 + 416 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 442589110 + ... + 442589258.

Almost surely, 2^65945788416 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 65945788416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107046522000).

65945788416 is an abundant number, since it is smaller than the sum of its proper divisors (148147255584).

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

65945788416 is a wasteful number, since it uses less digits than its factorization.

65945788416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 206 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 65945788416 in words is "sixty-five billion, nine hundred forty-five million, seven hundred eighty-eight thousand, four hundred sixteen".