12140347778 has 64 divisors (see below), whose sum is σ = 20710015200. Its totient is φ = 5298585600.

The previous prime is 12140347741. The next prime is 12140347789. The reversal of 12140347778 is 87774304121.

It can be written as a sum of positive squares in 16 ways, for example, as 88040689 + 12052307089 = 9383^2 + 109783^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7582178 + ... + 7583778.

Almost surely, 2^12140347778 is an apocalyptic number.

12140347778 is a deficient number, since it is larger than the sum of its proper divisors (8569667422).

12140347778 is a wasteful number, since it uses less digits than its factorization.

12140347778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847.

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 12140347778 in words is "twelve billion, one hundred forty million, three hundred forty-seven thousand, seven hundred seventy-eight".