1216762461817 has 16 divisors (see below), whose sum is σ = 1447733049472. Its totient is φ = 1000850981760.

The previous prime is 1216762461797. The next prime is 1216762461829. The reversal of 1216762461817 is 7181642676121.

It is not a de Polignac number, because 1216762461817 - 2¹⁵ = 1216762429049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216762401817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32158659 + ... + 32196472.

It is an arithmetic number, because the mean of its divisors is an integer number (90483315592).

Almost surely, 2^{1216762461817} is an apocalyptic number.

It is an amenable number.

1216762461817 is a deficient number, since it is larger than the sum of its proper divisors (230970587655).

1216762461817 is an equidigital number, since it uses as much as digits as its factorization.

1216762461817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64355248.

The product of its digits is 1354752, while the sum is 52.

The spelling of 1216762461817 in words is "one trillion, two hundred sixteen billion, seven hundred sixty-two million, four hundred sixty-one thousand, eight hundred seventeen".