12156051749 has 2 divisors, whose sum is σ = 12156051750. Its totient is φ = 12156051748.

The previous prime is 12156051707. The next prime is 12156051769. The reversal of 12156051749 is 94715065121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6677831524 + 5478220225 = 81718^2 + 74015^2 .

It is a cyclic number.

It is not a de Polignac number, because 12156051749 - 2²⁰ = 12155003173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12156051769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078025874 + 6078025875.

It is an arithmetic number, because the mean of its divisors is an integer number (6078025875).

Almost surely, 2^12156051749 is an apocalyptic number.

It is an amenable number.

12156051749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156051749 is an equidigital number, since it uses as much as digits as its factorization.

12156051749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 12156051749 in words is "twelve billion, one hundred fifty-six million, fifty-one thousand, seven hundred forty-nine".