1216756363 has 4 divisors (see below), whose sum is σ = 1217915128. Its totient is φ = 1215597600.

The previous prime is 1216756357. The next prime is 1216756379. The reversal of 1216756363 is 3636576121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1216756363 - 2⁹ = 1216755851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216756313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577806 + ... + 579907.

It is an arithmetic number, because the mean of its divisors is an integer number (304478782).

Almost surely, 2^1216756363 is an apocalyptic number.

1216756363 is a deficient number, since it is larger than the sum of its proper divisors (1158765).

1216756363 is a wasteful number, since it uses less digits than its factorization.

1216756363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158764.

The product of its digits is 136080, while the sum is 40.

The square root of 1216756363 is about 34882.0349607072. The cubic root of 1216756363 is about 1067.5819162824.

The spelling of 1216756363 in words is "one billion, two hundred sixteen million, seven hundred fifty-six thousand, three hundred sixty-three".