78724284735 has 16 divisors (see below), whose sum is σ = 126199707264. Its totient is φ = 41906001312.

The previous prime is 78724284697. The next prime is 78724284781. The reversal of 78724284735 is 53748242787.

It is not a de Polignac number, because 78724284735 - 2¹¹ = 78724282687 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5009637 + ... + 5025326.

It is an arithmetic number, because the mean of its divisors is an integer number (7887481704).

Almost surely, 2^78724284735 is an apocalyptic number.

78724284735 is a deficient number, since it is larger than the sum of its proper divisors (47475422529).

78724284735 is a wasteful number, since it uses less digits than its factorization.

78724284735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10035494.

The product of its digits is 21073920, while the sum is 57.

The spelling of 78724284735 in words is "seventy-eight billion, seven hundred twenty-four million, two hundred eighty-four thousand, seven hundred thirty-five".