117542742281 has 2 divisors, whose sum is σ = 117542742282. Its totient is φ = 117542742280.

The previous prime is 117542742209. The next prime is 117542742287. The reversal of 117542742281 is 182247245711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63512064256 + 54030678025 = 252016^2 + 232445^2 .

It is a cyclic number.

It is not a de Polignac number, because 117542742281 - 2²⁶ = 117475633417 is a prime.

It is a super-2 number, since 2×117542742281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117542742287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58771371140 + 58771371141.

It is an arithmetic number, because the mean of its divisors is an integer number (58771371141).

Almost surely, 2^117542742281 is an apocalyptic number.

It is an amenable number.

117542742281 is a deficient number, since it is larger than the sum of its proper divisors (1).

117542742281 is an equidigital number, since it uses as much as digits as its factorization.

117542742281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250880, while the sum is 44.

Adding to 117542742281 its reverse (182247245711), we get a palindrome (299789987992).

The spelling of 117542742281 in words is "one hundred seventeen billion, five hundred forty-two million, seven hundred forty-two thousand, two hundred eighty-one".