1195378745609 has 2 divisors, whose sum is σ = 1195378745610. Its totient is φ = 1195378745608.

The previous prime is 1195378745591. The next prime is 1195378745621. The reversal of 1195378745609 is 9065478735911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1112662109584 + 82716636025 = 1054828^2 + 287605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1195378745609 - 2²⁴ = 1195361968393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1195378742609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597689372804 + 597689372805.

It is an arithmetic number, because the mean of its divisors is an integer number (597689372805).

Almost surely, 2^{1195378745609} is an apocalyptic number.

It is an amenable number.

1195378745609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1195378745609 is an equidigital number, since it uses as much as digits as its factorization.

1195378745609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57153600, while the sum is 65.

The spelling of 1195378745609 in words is "one trillion, one hundred ninety-five billion, three hundred seventy-eight million, seven hundred forty-five thousand, six hundred nine".