12506130649 has 2 divisors, whose sum is σ = 12506130650. Its totient is φ = 12506130648.

The previous prime is 12506130599. The next prime is 12506130667. The reversal of 12506130649 is 94603160521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9529664400 + 2976466249 = 97620^2 + 54557^2 .

It is a cyclic number.

It is not a de Polignac number, because 12506130649 - 2⁷ = 12506130521 is a prime.

It is a super-2 number, since 2×12506130649² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12506139649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253065324 + 6253065325.

It is an arithmetic number, because the mean of its divisors is an integer number (6253065325).

Almost surely, 2^12506130649 is an apocalyptic number.

It is an amenable number.

12506130649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12506130649 is an equidigital number, since it uses as much as digits as its factorization.

12506130649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 12506130649 in words is "twelve billion, five hundred six million, one hundred thirty thousand, six hundred forty-nine".