117785055781 has 8 divisors (see below), whose sum is σ = 124722448704. Its totient is φ = 110848647360.

The previous prime is 117785055757. The next prime is 117785055859. The reversal of 117785055781 is 187550587711.

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

It is a cyclic number.

It is not a de Polignac number, because 117785055781 - 2⁷ = 117785055653 is a prime.

It is a super-2 number, since 2×117785055781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117785055181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7686 + ... + 485416.

It is an arithmetic number, because the mean of its divisors is an integer number (15590306088).

Almost surely, 2^117785055781 is an apocalyptic number.

It is an amenable number.

117785055781 is a deficient number, since it is larger than the sum of its proper divisors (6937392923).

117785055781 is a wasteful number, since it uses less digits than its factorization.

117785055781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492251.

The product of its (nonzero) digits is 2744000, while the sum is 55.

The spelling of 117785055781 in words is "one hundred seventeen billion, seven hundred eighty-five million, fifty-five thousand, seven hundred eighty-one".