116400065 has 4 divisors (see below), whose sum is σ = 139680084. Its totient is φ = 93120048.

The previous prime is 116400047. The next prime is 116400077. The reversal of 116400065 is 560004611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560004611 = 197 ⋅2842663.

It can be written as a sum of positive squares in 2 ways, for example, as 35093776 + 81306289 = 5924^2 + 9017^2 .

It is a cyclic number.

It is not a de Polignac number, because 116400065 - 2⁸ = 116399809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 116400065.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11640002 + ... + 11640011.

It is an arithmetic number, because the mean of its divisors is an integer number (34920021).

Almost surely, 2^116400065 is an apocalyptic number.

It is an amenable number.

116400065 is a deficient number, since it is larger than the sum of its proper divisors (23280019).

116400065 is an equidigital number, since it uses as much as digits as its factorization.

116400065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23280018.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 116400065 is about 10788.8861797685. The cubic root of 116400065 is about 488.2599184780.

Adding to 116400065 its reverse (560004611), we get a palindrome (676404676).

The spelling of 116400065 in words is "one hundred sixteen million, four hundred thousand, sixty-five".