1375615727989 has 2 divisors, whose sum is σ = 1375615727990. Its totient is φ = 1375615727988.

The previous prime is 1375615727957. The next prime is 1375615728007. The reversal of 1375615727989 is 9897275165731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1276409627089 + 99206100900 = 1129783^2 + 314970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375615727989 - 2⁵ = 1375615727957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375615722989) 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, 687807863994 + 687807863995.

It is an arithmetic number, because the mean of its divisors is an integer number (687807863995).

Almost surely, 2^{1375615727989} is an apocalyptic number.

It is an amenable number.

1375615727989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375615727989 is an equidigital number, since it uses as much as digits as its factorization.

1375615727989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200037600, while the sum is 70.

The spelling of 1375615727989 in words is "one trillion, three hundred seventy-five billion, six hundred fifteen million, seven hundred twenty-seven thousand, nine hundred eighty-nine".