117788661211 has 4 divisors (see below), whose sum is σ = 126849327472. Its totient is φ = 108727994952.

The previous prime is 117788661121. The next prime is 117788661239. The reversal of 117788661211 is 112166887711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117788661211 - 2¹³ = 117788653019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117788661271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4530333111 + ... + 4530333136.

It is an arithmetic number, because the mean of its divisors is an integer number (31712331868).

Almost surely, 2^117788661211 is an apocalyptic number.

117788661211 is a deficient number, since it is larger than the sum of its proper divisors (9060666261).

117788661211 is an equidigital number, since it uses as much as digits as its factorization.

117788661211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9060666260.

The product of its digits is 225792, while the sum is 49.

The spelling of 117788661211 in words is "one hundred seventeen billion, seven hundred eighty-eight million, six hundred sixty-one thousand, two hundred eleven".