1216388633088 has 160 divisors (see below), whose sum is σ = 3286589644800. Its totient is φ = 399721435136.

The previous prime is 1216388633077. The next prime is 1216388633101. The reversal of 1216388633088 is 8803368836121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61056793 + ... + 61076711.

It is an arithmetic number, because the mean of its divisors is an integer number (20541185280).

Almost surely, 2^{1216388633088} 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 1216388633088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1643294822400).

1216388633088 is an abundant number, since it is smaller than the sum of its proper divisors (2070201011712).

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

1216388633088 is an equidigital number, since it uses as much as digits as its factorization.

1216388633088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20502 (or 20486 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 1216388633088 in words is "one trillion, two hundred sixteen billion, three hundred eighty-eight million, six hundred thirty-three thousand, eighty-eight".