1216050765 has 32 divisors (see below), whose sum is σ = 2016213120. Its totient is φ = 625126656.

The previous prime is 1216050751. The next prime is 1216050767. The reversal of 1216050765 is 5670506121.

It is not a de Polignac number, because 1216050765 - 2¹³ = 1216042573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216050767) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 295059 + ... + 299151.

It is an arithmetic number, because the mean of its divisors is an integer number (63006660).

Almost surely, 2^1216050765 is an apocalyptic number.

1216050765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1216050765 is a deficient number, since it is larger than the sum of its proper divisors (800162355).

1216050765 is a wasteful number, since it uses less digits than its factorization.

1216050765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 1216050765 is about 34871.9194338367. The cubic root of 1216050765 is about 1067.3755125068.

Adding to 1216050765 its reverse (5670506121), we get a palindrome (6886556886).

The spelling of 1216050765 in words is "one billion, two hundred sixteen million, fifty thousand, seven hundred sixty-five".