1216240463648 has 144 divisors (see below), whose sum is σ = 2802241389024. Its totient is φ = 518104258560.

The previous prime is 1216240463593. The next prime is 1216240463651. The reversal of 1216240463648 is 8463640426121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221817515 + ... + 221822997.

It is an arithmetic number, because the mean of its divisors is an integer number (19460009646).

Almost surely, 2^{1216240463648} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216240463648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401120694512).

1216240463648 is an abundant number, since it is smaller than the sum of its proper divisors (1586000925376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216240463648 is a wasteful number, since it uses less digits than its factorization.

1216240463648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6335 (or 6320 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 47.

Adding to 1216240463648 its reverse (8463640426121), we get a palindrome (9679880889769).

The spelling of 1216240463648 in words is "one trillion, two hundred sixteen billion, two hundred forty million, four hundred sixty-three thousand, six hundred forty-eight".