116412861781 has 4 divisors (see below), whose sum is σ = 116413743852. Its totient is φ = 116411979712.

The previous prime is 116412861767. The next prime is 116412861811. The reversal of 116412861781 is 187168214611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 60314939281 + 56097922500 = 245591^2 + 236850^2 .

It is a cyclic number.

It is not a de Polignac number, because 116412861781 - 2¹⁹ = 116412337493 is a prime.

It is a super-2 number, since 2×116412861781² (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 (116412861751) 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, 198676 + ... + 521821.

It is an arithmetic number, because the mean of its divisors is an integer number (29103435963).

Almost surely, 2^116412861781 is an apocalyptic number.

It is an amenable number.

116412861781 is a deficient number, since it is larger than the sum of its proper divisors (882071).

116412861781 is an equidigital number, since it uses as much as digits as its factorization.

116412861781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882070.

The product of its digits is 129024, while the sum is 46.

The spelling of 116412861781 in words is "one hundred sixteen billion, four hundred twelve million, eight hundred sixty-one thousand, seven hundred eighty-one".