12078556969 has 2 divisors, whose sum is σ = 12078556970. Its totient is φ = 12078556968.

The previous prime is 12078556961. The next prime is 12078556999. The reversal of 12078556969 is 96965587021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9619686400 + 2458870569 = 98080^2 + 49587^2 .

It is an emirp because it is prime and its reverse (96965587021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12078556969 - 2³ = 12078556961 is a prime.

It is a super-2 number, since 2×12078556969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12078556961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6039278484 + 6039278485.

It is an arithmetic number, because the mean of its divisors is an integer number (6039278485).

Almost surely, 2^12078556969 is an apocalyptic number.

It is an amenable number.

12078556969 is a deficient number, since it is larger than the sum of its proper divisors (1).

12078556969 is an equidigital number, since it uses as much as digits as its factorization.

12078556969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 12078556969 in words is "twelve billion, seventy-eight million, five hundred fifty-six thousand, nine hundred sixty-nine".