1216182011745 has 16 divisors (see below), whose sum is σ = 1950149197440. Its totient is φ = 647211080064.

The previous prime is 1216182011743. The next prime is 1216182011747. The reversal of 1216182011745 is 5471102816121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1216182011743) and next prime (1216182011747).

It is not a de Polignac number, because 1216182011745 - 2¹ = 1216182011743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216182011743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88700805 + ... + 88714514.

It is an arithmetic number, because the mean of its divisors is an integer number (121884324840).

Almost surely, 2^{1216182011745} is an apocalyptic number.

1216182011745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1216182011745 is a deficient number, since it is larger than the sum of its proper divisors (733967185695).

1216182011745 is a wasteful number, since it uses less digits than its factorization.

1216182011745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177415784.

The product of its (nonzero) digits is 26880, while the sum is 39.

Adding to 1216182011745 its reverse (5471102816121), we get a palindrome (6687284827866).

The spelling of 1216182011745 in words is "one trillion, two hundred sixteen billion, one hundred eighty-two million, eleven thousand, seven hundred forty-five".