78384917223 has 24 divisors (see below), whose sum is σ = 116371859760. Its totient is φ = 50822386560.

The previous prime is 78384917173. The next prime is 78384917251. The reversal of 78384917223 is 32271948387.

78384917223 is a `hidden beast` number, since 7 + 83 + 8 + 491 + 72 + 2 + 3 = 666.

It is not a de Polignac number, because 78384917223 - 2¹⁶ = 78384851687 is a prime.

It is a super-2 number, since 2×78384917223² (a number of 23 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 78384917223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78384917293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 753261 + ... + 850982.

It is an arithmetic number, because the mean of its divisors is an integer number (4848827490).

Almost surely, 2^78384917223 is an apocalyptic number.

78384917223 is a deficient number, since it is larger than the sum of its proper divisors (37986942537).

78384917223 is a wasteful number, since it uses less digits than its factorization.

78384917223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604399 (or 1604396 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 78384917223 in words is "seventy-eight billion, three hundred eighty-four million, nine hundred seventeen thousand, two hundred twenty-three".