12156789739 has 2 divisors, whose sum is σ = 12156789740. Its totient is φ = 12156789738.

The previous prime is 12156789721. The next prime is 12156789769. The reversal of 12156789739 is 93798765121.

It is a weak prime.

It is an emirp because it is prime and its reverse (93798765121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12156789739 - 2⁷ = 12156789611 is a prime.

It is not a weakly prime, because it can be changed into another prime (12156789719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078394869 + 6078394870.

It is an arithmetic number, because the mean of its divisors is an integer number (6078394870).

Almost surely, 2^12156789739 is an apocalyptic number.

12156789739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156789739 is an equidigital number, since it uses as much as digits as its factorization.

12156789739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 58.

The spelling of 12156789739 in words is "twelve billion, one hundred fifty-six million, seven hundred eighty-nine thousand, seven hundred thirty-nine".