116018781 has 4 divisors (see below), whose sum is σ = 154691712. Its totient is φ = 77345852.

The previous prime is 116018779. The next prime is 116018783. The reversal of 116018781 is 187810611.

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 an interprime number because it is at equal distance from previous prime (116018779) and next prime (116018783).

It is a cyclic number.

It is not a de Polignac number, because 116018781 - 2¹ = 116018779 is a prime.

It is a super-4 number, since 4×116018781⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116018783) 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, 19336461 + ... + 19336466.

It is an arithmetic number, because the mean of its divisors is an integer number (38672928).

Almost surely, 2^116018781 is an apocalyptic number.

It is an amenable number.

116018781 is a deficient number, since it is larger than the sum of its proper divisors (38672931).

116018781 is an equidigital number, since it uses as much as digits as its factorization.

116018781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38672930.

The product of its (nonzero) digits is 2688, while the sum is 33.

The square root of 116018781 is about 10771.2014650177. The cubic root of 116018781 is about 487.7262150656.

The spelling of 116018781 in words is "one hundred sixteen million, eighteen thousand, seven hundred eighty-one".