1276880370173 has 2 divisors, whose sum is σ = 1276880370174. Its totient is φ = 1276880370172.

The previous prime is 1276880370151. The next prime is 1276880370239. The reversal of 1276880370173 is 3710730886721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1273347494329 + 3532875844 = 1128427^2 + 59438^2 .

It is an emirp because it is prime and its reverse (3710730886721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1276880370173 - 2⁶ = 1276880370109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276880370373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638440185086 + 638440185087.

It is an arithmetic number, because the mean of its divisors is an integer number (638440185087).

Almost surely, 2^{1276880370173} is an apocalyptic number.

It is an amenable number.

1276880370173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276880370173 is an equidigital number, since it uses as much as digits as its factorization.

1276880370173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 1276880370173 in words is "one trillion, two hundred seventy-six billion, eight hundred eighty million, three hundred seventy thousand, one hundred seventy-three".