1277650125313 has 2 divisors, whose sum is σ = 1277650125314. Its totient is φ = 1277650125312.

The previous prime is 1277650125211. The next prime is 1277650125329. The reversal of 1277650125313 is 3135210567721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 923015583169 + 354634542144 = 960737^2 + 595512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277650125313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1277650125313.

It is not a weakly prime, because it can be changed into another prime (1277650125413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638825062656 + 638825062657.

It is an arithmetic number, because the mean of its divisors is an integer number (638825062657).

Almost surely, 2^{1277650125313} is an apocalyptic number.

It is an amenable number.

1277650125313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277650125313 is an equidigital number, since it uses as much as digits as its factorization.

1277650125313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 43.

The spelling of 1277650125313 in words is "one trillion, two hundred seventy-seven billion, six hundred fifty million, one hundred twenty-five thousand, three hundred thirteen".