117542742261 has 128 divisors (see below), whose sum is σ = 199349145600. Its totient is φ = 60092928000.

The previous prime is 117542742209. The next prime is 117542742281. The reversal of 117542742261 is 162247245711.

It is not a de Polignac number, because 117542742261 - 2⁶ = 117542742197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117542742281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 170104926 + ... + 170105616.

It is an arithmetic number, because the mean of its divisors is an integer number (1557415200).

Almost surely, 2^117542742261 is an apocalyptic number.

It is an amenable number.

117542742261 is a deficient number, since it is larger than the sum of its proper divisors (81806403339).

117542742261 is a wasteful number, since it uses less digits than its factorization.

117542742261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 188160, while the sum is 42.

Adding to 117542742261 its reverse (162247245711), we get a palindrome (279789987972).

The spelling of 117542742261 in words is "one hundred seventeen billion, five hundred forty-two million, seven hundred forty-two thousand, two hundred sixty-one".