1269673205081 has 2 divisors, whose sum is σ = 1269673205082. Its totient is φ = 1269673205080.

The previous prime is 1269673205069. The next prime is 1269673205149. The reversal of 1269673205081 is 1805023769621.

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., 1126603925056 + 143069280025 = 1061416^2 + 378245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1269673205081 - 2¹⁰ = 1269673204057 is a prime.

It is a super-2 number, since 2×1269673205081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1269673205011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634836602540 + 634836602541.

It is an arithmetic number, because the mean of its divisors is an integer number (634836602541).

Almost surely, 2^{1269673205081} is an apocalyptic number.

It is an amenable number.

1269673205081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1269673205081 is an equidigital number, since it uses as much as digits as its factorization.

1269673205081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 1269673205081 in words is "one trillion, two hundred sixty-nine billion, six hundred seventy-three million, two hundred five thousand, eighty-one".