117777789661 has 8 divisors (see below), whose sum is σ = 135166383360. Its totient is φ = 100529994768.

The previous prime is 117777789659. The next prime is 117777789683. The reversal of 117777789661 is 166987777711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117777789661 - 2¹ = 117777789659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117777789631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35197906 + ... + 35201251.

It is an arithmetic number, because the mean of its divisors is an integer number (16895797920).

Almost surely, 2^117777789661 is an apocalyptic number.

It is an amenable number.

117777789661 is a deficient number, since it is larger than the sum of its proper divisors (17388593699).

117777789661 is an equidigital number, since it uses as much as digits as its factorization.

117777789661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70399403.

The product of its digits is 43563744, while the sum is 67.

The spelling of 117777789661 in words is "one hundred seventeen billion, seven hundred seventy-seven million, seven hundred eighty-nine thousand, six hundred sixty-one".