1172078076509 has 2 divisors, whose sum is σ = 1172078076510. Its totient is φ = 1172078076508.

The previous prime is 1172078076493. The next prime is 1172078076529. The reversal of 1172078076509 is 9056708702711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1164193524484 + 7884552025 = 1078978^2 + 88795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172078076509 - 2⁴ = 1172078076493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1172078076529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586039038254 + 586039038255.

It is an arithmetic number, because the mean of its divisors is an integer number (586039038255).

Almost surely, 2^{1172078076509} is an apocalyptic number.

It is an amenable number.

1172078076509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172078076509 is an equidigital number, since it uses as much as digits as its factorization.

1172078076509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1481760, while the sum is 53.

The spelling of 1172078076509 in words is "one trillion, one hundred seventy-two billion, seventy-eight million, seventy-six thousand, five hundred nine".