1116716781 has 4 divisors (see below), whose sum is σ = 1488955712. Its totient is φ = 744477852.

The previous prime is 1116716771. The next prime is 1116716801. The reversal of 1116716781 is 1876176111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1116716781 - 2¹¹ = 1116714733 is a prime.

It is a super-2 number, since 2×1116716781² = 2494112737934003922, which 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 (1116716771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186119461 + ... + 186119466.

It is an arithmetic number, because the mean of its divisors is an integer number (372238928).

Almost surely, 2^1116716781 is an apocalyptic number.

It is an amenable number.

1116716781 is a deficient number, since it is larger than the sum of its proper divisors (372238931).

1116716781 is an equidigital number, since it uses as much as digits as its factorization.

1116716781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372238930.

The product of its digits is 14112, while the sum is 39.

The square root of 1116716781 is about 33417.3125939235. The cubic root of 1116716781 is about 1037.4830595966.

The spelling of 1116716781 in words is "one billion, one hundred sixteen million, seven hundred sixteen thousand, seven hundred eighty-one".