126220775051669 has 2 divisors, whose sum is σ = 126220775051670. Its totient is φ = 126220775051668.

The previous prime is 126220775051647. The next prime is 126220775051699. The reversal of 126220775051669 is 966150577022621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121564406640625 + 4656368411044 = 11025625^2 + 2157862^2 .

It is a cyclic number.

It is not a de Polignac number, because 126220775051669 - 2¹⁶ = 126220774986133 is a prime.

It is a super-2 number, since 2×126220775051669² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126220775051639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63110387525834 + 63110387525835.

It is an arithmetic number, because the mean of its divisors is an integer number (63110387525835).

Almost surely, 2^{126220775051669} is an apocalyptic number.

It is an amenable number.

126220775051669 is a deficient number, since it is larger than the sum of its proper divisors (1).

126220775051669 is an equidigital number, since it uses as much as digits as its factorization.

126220775051669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 126220775051669 in words is "one hundred twenty-six trillion, two hundred twenty billion, seven hundred seventy-five million, fifty-one thousand, six hundred sixty-nine".