65785376440 has 64 divisors (see below), whose sum is σ = 169329139200. Its totient is φ = 22532754048.

The previous prime is 65785376407. The next prime is 65785376471. The reversal of 65785376440 is 4467358756.

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 15 ways as a sum of consecutive naturals, for example, 170037 + ... + 400603.

It is an arithmetic number, because the mean of its divisors is an integer number (2645767800).

Almost surely, 2^65785376440 is an apocalyptic number.

It is an amenable number.

65785376440 is an abundant number, since it is smaller than the sum of its proper divisors (103543762760).

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

65785376440 is a wasteful number, since it uses less digits than its factorization.

65785376440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231604 (or 231600 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 55.

It can be divided in two parts, 65785 and 376440, that added together give a square (442225 = 665²).

The spelling of 65785376440 in words is "sixty-five billion, seven hundred eighty-five million, three hundred seventy-six thousand, four hundred forty".