126303163561 has 2 divisors, whose sum is σ = 126303163562. Its totient is φ = 126303163560.

The previous prime is 126303163549. The next prime is 126303163583. The reversal of 126303163561 is 165361303621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79363341225 + 46939822336 = 281715^2 + 216656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126303163561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126303163561.

It is not a weakly prime, because it can be changed into another prime (126303163531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63151581780 + 63151581781.

It is an arithmetic number, because the mean of its divisors is an integer number (63151581781).

Almost surely, 2^126303163561 is an apocalyptic number.

It is an amenable number.

126303163561 is a deficient number, since it is larger than the sum of its proper divisors (1).

126303163561 is an equidigital number, since it uses as much as digits as its factorization.

126303163561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 37.

The spelling of 126303163561 in words is "one hundred twenty-six billion, three hundred three million, one hundred sixty-three thousand, five hundred sixty-one".