126756648869 has 2 divisors, whose sum is σ = 126756648870. Its totient is φ = 126756648868.

The previous prime is 126756648797. The next prime is 126756648877. The reversal of 126756648869 is 968846657621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93598059844 + 33158589025 = 305938^2 + 182095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126756648869 is a prime.

It is a super-2 number, since 2×126756648869² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126756648799 and 126756648808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126756642869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63378324434 + 63378324435.

It is an arithmetic number, because the mean of its divisors is an integer number (63378324435).

Almost surely, 2^126756648869 is an apocalyptic number.

It is an amenable number.

126756648869 is a deficient number, since it is larger than the sum of its proper divisors (1).

126756648869 is an equidigital number, since it uses as much as digits as its factorization.

126756648869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209018880, while the sum is 68.

The spelling of 126756648869 in words is "one hundred twenty-six billion, seven hundred fifty-six million, six hundred forty-eight thousand, eight hundred sixty-nine".