1780132139069 has 2 divisors, whose sum is σ = 1780132139070. Its totient is φ = 1780132139068.

The previous prime is 1780132139057. The next prime is 1780132139171. The reversal of 1780132139069 is 9609312310871.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1708348333444 + 71783805625 = 1307038^2 + 267925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1780132139069 is a prime.

It is a super-2 number, since 2×1780132139069² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1780132139969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890066069534 + 890066069535.

It is an arithmetic number, because the mean of its divisors is an integer number (890066069535).

Almost surely, 2^{1780132139069} is an apocalyptic number.

It is an amenable number.

1780132139069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1780132139069 is an equidigital number, since it uses as much as digits as its factorization.

1780132139069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 1780132139069 in words is "one trillion, seven hundred eighty billion, one hundred thirty-two million, one hundred thirty-nine thousand, sixty-nine".