12531156149 has 2 divisors, whose sum is σ = 12531156150. Its totient is φ = 12531156148.

The previous prime is 12531156119. The next prime is 12531156227. The reversal of 12531156149 is 94165113521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8771259025 + 3759897124 = 93655^2 + 61318^2 .

It is a cyclic number.

It is not a de Polignac number, because 12531156149 - 2¹⁶ = 12531090613 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 (12531156119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6265578074 + 6265578075.

It is an arithmetic number, because the mean of its divisors is an integer number (6265578075).

Almost surely, 2^12531156149 is an apocalyptic number.

It is an amenable number.

12531156149 is a deficient number, since it is larger than the sum of its proper divisors (1).

12531156149 is an equidigital number, since it uses as much as digits as its factorization.

12531156149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The spelling of 12531156149 in words is "twelve billion, five hundred thirty-one million, one hundred fifty-six thousand, one hundred forty-nine".