1375346668609 has 2 divisors, whose sum is σ = 1375346668610. Its totient is φ = 1375346668608.

The previous prime is 1375346668607. The next prime is 1375346668643. The reversal of 1375346668609 is 9068666435731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1372025682225 + 3320986384 = 1171335^2 + 57628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375346668609 - 2¹ = 1375346668607 is a prime.

Together with 1375346668607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1375346668601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687673334304 + 687673334305.

It is an arithmetic number, because the mean of its divisors is an integer number (687673334305).

Almost surely, 2^{1375346668609} is an apocalyptic number.

It is an amenable number.

1375346668609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375346668609 is an equidigital number, since it uses as much as digits as its factorization.

1375346668609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117573120, while the sum is 64.

The spelling of 1375346668609 in words is "one trillion, three hundred seventy-five billion, three hundred forty-six million, six hundred sixty-eight thousand, six hundred nine".