1375358247649 has 2 divisors, whose sum is σ = 1375358247650. Its totient is φ = 1375358247648.

The previous prime is 1375358247643. The next prime is 1375358247671. The reversal of 1375358247649 is 9467428535731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 701305753600 + 674052494049 = 837440^2 + 821007^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375358247649 - 2¹⁷ = 1375358116577 is a prime.

It is a super-2 number, since 2×1375358247649² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1375358247643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687679123824 + 687679123825.

It is an arithmetic number, because the mean of its divisors is an integer number (687679123825).

Almost surely, 2^{1375358247649} is an apocalyptic number.

It is an amenable number.

1375358247649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375358247649 is an equidigital number, since it uses as much as digits as its factorization.

1375358247649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 152409600, while the sum is 64.

The spelling of 1375358247649 in words is "one trillion, three hundred seventy-five billion, three hundred fifty-eight million, two hundred forty-seven thousand, six hundred forty-nine".