1216737005 has 16 divisors (see below), whose sum is σ = 1686515904. Its totient is φ = 832846080.

The previous prime is 1216736981. The next prime is 1216737019. The reversal of 1216737005 is 5007376121.

It is not a de Polignac number, because 1216737005 - 2¹⁰ = 1216735981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649727 + ... + 651596.

It is an arithmetic number, because the mean of its divisors is an integer number (105407244).

Almost surely, 2^1216737005 is an apocalyptic number.

It is an amenable number.

1216737005 is a deficient number, since it is larger than the sum of its proper divisors (469778899).

1216737005 is a wasteful number, since it uses less digits than its factorization.

1216737005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301356.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 1216737005 is about 34881.7574815261. The cubic root of 1216737005 is about 1067.5762546833.

The spelling of 1216737005 in words is "one billion, two hundred sixteen million, seven hundred thirty-seven thousand, five".