1281827323877 has 2 divisors, whose sum is σ = 1281827323878. Its totient is φ = 1281827323876.

The previous prime is 1281827323873. The next prime is 1281827323891. The reversal of 1281827323877 is 7783237281821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913389249796 + 368438074081 = 955714^2 + 606991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1281827323877 - 2² = 1281827323873 is a prime.

It is a super-2 number, since 2×1281827323877² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281827323873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640913661938 + 640913661939.

It is an arithmetic number, because the mean of its divisors is an integer number (640913661939).

Almost surely, 2^{1281827323877} is an apocalyptic number.

It is an amenable number.

1281827323877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281827323877 is an equidigital number, since it uses as much as digits as its factorization.

1281827323877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12644352, while the sum is 59.

The spelling of 1281827323877 in words is "one trillion, two hundred eighty-one billion, eight hundred twenty-seven million, three hundred twenty-three thousand, eight hundred seventy-seven".