117542742209 has 2 divisors, whose sum is σ = 117542742210. Its totient is φ = 117542742208.

The previous prime is 117542742197. The next prime is 117542742281. The reversal of 117542742209 is 902247245711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98014077184 + 19528665025 = 313072^2 + 139745^2 .

It is a cyclic number.

It is not a de Polignac number, because 117542742209 - 2⁴ = 117542742193 is a prime.

It is a super-2 number, since 2×117542742209² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 117542742209.

It is not a weakly prime, because it can be changed into another prime (117542742409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58771371104 + 58771371105.

It is an arithmetic number, because the mean of its divisors is an integer number (58771371105).

Almost surely, 2^117542742209 is an apocalyptic number.

It is an amenable number.

117542742209 is a deficient number, since it is larger than the sum of its proper divisors (1).

117542742209 is an equidigital number, since it uses as much as digits as its factorization.

117542742209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 117542742209 in words is "one hundred seventeen billion, five hundred forty-two million, seven hundred forty-two thousand, two hundred nine".