126776707261 has 2 divisors, whose sum is σ = 126776707262. Its totient is φ = 126776707260.

The previous prime is 126776707249. The next prime is 126776707289. The reversal of 126776707261 is 162707677621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114457039225 + 12319668036 = 338315^2 + 110994^2 .

It is a cyclic number.

It is not a de Polignac number, because 126776707261 - 2¹³ = 126776699069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126776707199 and 126776707208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126776707201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63388353630 + 63388353631.

It is an arithmetic number, because the mean of its divisors is an integer number (63388353631).

Almost surely, 2^126776707261 is an apocalyptic number.

It is an amenable number.

126776707261 is a deficient number, since it is larger than the sum of its proper divisors (1).

126776707261 is an equidigital number, since it uses as much as digits as its factorization.

126776707261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2074464, while the sum is 52.

The spelling of 126776707261 in words is "one hundred twenty-six billion, seven hundred seventy-six million, seven hundred seven thousand, two hundred sixty-one".