12345140779 has 2 divisors, whose sum is σ = 12345140780. Its totient is φ = 12345140778.

The previous prime is 12345140653. The next prime is 12345140813. The reversal of 12345140779 is 97704154321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12345140779 - 2¹³ = 12345132587 is a prime.

It is not a weakly prime, because it can be changed into another prime (12345140879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172570389 + 6172570390.

It is an arithmetic number, because the mean of its divisors is an integer number (6172570390).

Almost surely, 2^12345140779 is an apocalyptic number.

12345140779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345140779 is an equidigital number, since it uses as much as digits as its factorization.

12345140779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 12345140779 in words is "twelve billion, three hundred forty-five million, one hundred forty thousand, seven hundred seventy-nine".