12178705539 has 144 divisors (see below), whose sum is σ = 23094758400. Its totient is φ = 5648227200.

The previous prime is 12178705507. The next prime is 12178705549. The reversal of 12178705539 is 93550787121.

It is not a de Polignac number, because 12178705539 - 2⁵ = 12178705507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12178705549) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7167312 + ... + 7169010.

Almost surely, 2^12178705539 is an apocalyptic number.

12178705539 is a deficient number, since it is larger than the sum of its proper divisors (10916052861).

12178705539 is a wasteful number, since it uses less digits than its factorization.

12178705539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 48.

It can be divided in two parts, 12178 and 705539, that added together give a palindrome (717717).

The spelling of 12178705539 in words is "twelve billion, one hundred seventy-eight million, seven hundred five thousand, five hundred thirty-nine".