1097780745539 has 2 divisors, whose sum is σ = 1097780745540. Its totient is φ = 1097780745538.

The previous prime is 1097780745491. The next prime is 1097780745623. The reversal of 1097780745539 is 9355470877901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1097780745539 - 2¹² = 1097780741443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1097780745739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548890372769 + 548890372770.

It is an arithmetic number, because the mean of its divisors is an integer number (548890372770).

Almost surely, 2^{1097780745539} is an apocalyptic number.

1097780745539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097780745539 is an equidigital number, since it uses as much as digits as its factorization.

1097780745539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66679200, while the sum is 65.

The spelling of 1097780745539 in words is "one trillion, ninety-seven billion, seven hundred eighty million, seven hundred forty-five thousand, five hundred thirty-nine".