116551212665 has 4 divisors (see below), whose sum is σ = 139861455204. Its totient is φ = 93240970128.

The previous prime is 116551212629. The next prime is 116551212691. The reversal of 116551212665 is 566212155611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566212155611 = 19 ⋅29800639769.

It can be written as a sum of positive squares in 2 ways, for example, as 78585469561 + 37965743104 = 280331^2 + 194848^2 .

It is a cyclic number.

It is not a de Polignac number, because 116551212665 - 2¹² = 116551208569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11655121262 + ... + 11655121271.

It is an arithmetic number, because the mean of its divisors is an integer number (34965363801).

Almost surely, 2^116551212665 is an apocalyptic number.

It is an amenable number.

116551212665 is a deficient number, since it is larger than the sum of its proper divisors (23310242539).

116551212665 is an equidigital number, since it uses as much as digits as its factorization.

116551212665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23310242538.

The product of its digits is 108000, while the sum is 41.

The spelling of 116551212665 in words is "one hundred sixteen billion, five hundred fifty-one million, two hundred twelve thousand, six hundred sixty-five".