1372773786809 has 2 divisors, whose sum is σ = 1372773786810. Its totient is φ = 1372773786808.

The previous prime is 1372773786793. The next prime is 1372773786823. The reversal of 1372773786809 is 9086873772731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 858402250000 + 514371536809 = 926500^2 + 717197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372773786809 - 2⁴ = 1372773786793 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 (1372773786869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686386893404 + 686386893405.

It is an arithmetic number, because the mean of its divisors is an integer number (686386893405).

Almost surely, 2^{1372773786809} is an apocalyptic number.

It is an amenable number.

1372773786809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372773786809 is an equidigital number, since it uses as much as digits as its factorization.

1372773786809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 149361408, while the sum is 68.

The spelling of 1372773786809 in words is "one trillion, three hundred seventy-two billion, seven hundred seventy-three million, seven hundred eighty-six thousand, eight hundred nine".