65381983443 has 48 divisors (see below), whose sum is σ = 111040203456. Its totient is φ = 36293114880.

The previous prime is 65381983439. The next prime is 65381983451. The reversal of 65381983443 is 34438918356.

65381983443 is a `hidden beast` number, since 6 + 5 + 3 + 8 + 198 + 3 + 443 = 666.

It is not a de Polignac number, because 65381983443 - 2² = 65381983439 is a prime.

It is a super-2 number, since 2×65381983443² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65381983443.

It is not an unprimeable number, because it can be changed into a prime (65381983453) 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 47 ways as a sum of consecutive naturals, for example, 547521 + ... + 656157.

It is an arithmetic number, because the mean of its divisors is an integer number (2313337572).

Almost surely, 2^65381983443 is an apocalyptic number.

65381983443 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

65381983443 is a deficient number, since it is larger than the sum of its proper divisors (45658220013).

65381983443 is a wasteful number, since it uses less digits than its factorization.

65381983443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108924 (or 108921 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 65381983443 in words is "sixty-five billion, three hundred eighty-one million, nine hundred eighty-three thousand, four hundred forty-three".