1216160365 has 32 divisors (see below), whose sum is σ = 1788410880. Its totient is φ = 774918144.

The previous prime is 1216160339. The next prime is 1216160389. The reversal of 1216160365 is 5630616121.

It is a de Polignac number, because none of the positive numbers 2^k-1216160365 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34069 + ... + 59941.

It is an arithmetic number, because the mean of its divisors is an integer number (55887840).

Almost surely, 2^1216160365 is an apocalyptic number.

It is an amenable number.

1216160365 is a deficient number, since it is larger than the sum of its proper divisors (572250515).

1216160365 is a wasteful number, since it uses less digits than its factorization.

1216160365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25981.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1216160365 is about 34873.4908634051. The cubic root of 1216160365 is about 1067.4075782849.

Adding to 1216160365 its reverse (5630616121), we get a palindrome (6846776486).

The spelling of 1216160365 in words is "one billion, two hundred sixteen million, one hundred sixty thousand, three hundred sixty-five".