11742245578117 has 2 divisors, whose sum is σ = 11742245578118. Its totient is φ = 11742245578116.

The previous prime is 11742245578081. The next prime is 11742245578171. The reversal of 11742245578117 is 71187554224711.

Together with next prime (11742245578171) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11731077104356 + 11168473761 = 3425066^2 + 105681^2 .

It is a cyclic number.

It is not a de Polignac number, because 11742245578117 - 2¹¹ = 11742245576069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11742245578717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5871122789058 + 5871122789059.

It is an arithmetic number, because the mean of its divisors is an integer number (5871122789059).

Almost surely, 2^{11742245578117} is an apocalyptic number.

It is an amenable number.

11742245578117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11742245578117 is an equidigital number, since it uses as much as digits as its factorization.

11742245578117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4390400, while the sum is 55.

The spelling of 11742245578117 in words is "eleven trillion, seven hundred forty-two billion, two hundred forty-five million, five hundred seventy-eight thousand, one hundred seventeen".