1345273709881 has 2 divisors, whose sum is σ = 1345273709882. Its totient is φ = 1345273709880.

The previous prime is 1345273709867. The next prime is 1345273709903. The reversal of 1345273709881 is 1889073725431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1345272899881 + 810000 = 1159859^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345273709881 - 2⁹ = 1345273709369 is a prime.

It is a super-2 number, since 2×1345273709881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1345273709851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672636854940 + 672636854941.

It is an arithmetic number, because the mean of its divisors is an integer number (672636854941).

Almost surely, 2^{1345273709881} is an apocalyptic number.

It is an amenable number.

1345273709881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345273709881 is an equidigital number, since it uses as much as digits as its factorization.

1345273709881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 1345273709881 in words is "one trillion, three hundred forty-five billion, two hundred seventy-three million, seven hundred nine thousand, eight hundred eighty-one".