65775585645 has 48 divisors (see below), whose sum is σ = 142143610752. Its totient is φ = 27335306880.

The previous prime is 65775585611. The next prime is 65775585661. The reversal of 65775585645 is 54658557756.

65775585645 is a `hidden beast` number, since 6 + 5 + 7 + 7 + 5 + 585 + 6 + 45 = 666.

It is not a de Polignac number, because 65775585645 - 2¹² = 65775581549 is a prime.

It is a super-3 number, since 3×65775585645³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 9487962 + ... + 9494891.

It is an arithmetic number, because the mean of its divisors is an integer number (2961325224).

Almost surely, 2^65775585645 is an apocalyptic number.

It is an amenable number.

65775585645 is an abundant number, since it is smaller than the sum of its proper divisors (76368025107).

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

65775585645 is a wasteful number, since it uses less digits than its factorization.

65775585645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18982882 (or 18982879 counting only the distinct ones).

The product of its digits is 176400000, while the sum is 63.

The spelling of 65775585645 in words is "sixty-five billion, seven hundred seventy-five million, five hundred eighty-five thousand, six hundred forty-five".