126766957613 has 2 divisors, whose sum is σ = 126766957614. Its totient is φ = 126766957612.

The previous prime is 126766957609. The next prime is 126766957621. The reversal of 126766957613 is 316759667621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92502356164 + 34264601449 = 304142^2 + 185107^2 .

It is a cyclic number.

It is not a de Polignac number, because 126766957613 - 2² = 126766957609 is a prime.

It is a super-2 number, since 2×126766957613² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126766957633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63383478806 + 63383478807.

It is an arithmetic number, because the mean of its divisors is an integer number (63383478807).

Almost surely, 2^126766957613 is an apocalyptic number.

It is an amenable number.

126766957613 is a deficient number, since it is larger than the sum of its proper divisors (1).

126766957613 is an equidigital number, since it uses as much as digits as its factorization.

126766957613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 59.

The spelling of 126766957613 in words is "one hundred twenty-six billion, seven hundred sixty-six million, nine hundred fifty-seven thousand, six hundred thirteen".