112782173909 has 2 divisors, whose sum is σ = 112782173910. Its totient is φ = 112782173908.

The previous prime is 112782173863. The next prime is 112782173921. The reversal of 112782173909 is 909371287211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109811378884 + 2970795025 = 331378^2 + 54505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112782173909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112782170909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56391086954 + 56391086955.

It is an arithmetic number, because the mean of its divisors is an integer number (56391086955).

Almost surely, 2^112782173909 is an apocalyptic number.

It is an amenable number.

112782173909 is a deficient number, since it is larger than the sum of its proper divisors (1).

112782173909 is an equidigital number, since it uses as much as digits as its factorization.

112782173909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 50.

The spelling of 112782173909 in words is "one hundred twelve billion, seven hundred eighty-two million, one hundred seventy-three thousand, nine hundred nine".