126143815517 has 2 divisors, whose sum is σ = 126143815518. Its totient is φ = 126143815516.

The previous prime is 126143815493. The next prime is 126143815541. The reversal of 126143815517 is 715518341621.

It is a balanced prime because it is at equal distance from previous prime (126143815493) and next prime (126143815541).

It can be written as a sum of positive squares in only one way, i.e., 83401974436 + 42741841081 = 288794^2 + 206741^2 .

It is a cyclic number.

It is not a de Polignac number, because 126143815517 - 2⁶ = 126143815453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126143815597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63071907758 + 63071907759.

It is an arithmetic number, because the mean of its divisors is an integer number (63071907759).

Almost surely, 2^126143815517 is an apocalyptic number.

It is an amenable number.

126143815517 is a deficient number, since it is larger than the sum of its proper divisors (1).

126143815517 is an equidigital number, since it uses as much as digits as its factorization.

126143815517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 44.

The spelling of 126143815517 in words is "one hundred twenty-six billion, one hundred forty-three million, eight hundred fifteen thousand, five hundred seventeen".