1217842981248 has 128 divisors (see below), whose sum is σ = 3256986227040. Its totient is φ = 403177881600.

The previous prime is 1217842981237. The next prime is 1217842981261. The reversal of 1217842981248 is 8421892487121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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, 215888508 + ... + 215894148.

Almost surely, 2^{1217842981248} 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 1217842981248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1628493113520).

1217842981248 is an abundant number, since it is smaller than the sum of its proper divisors (2039143245792).

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

1217842981248 is a wasteful number, since it uses less digits than its factorization.

1217842981248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9396 (or 9384 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 57.

The spelling of 1217842981248 in words is "one trillion, two hundred seventeen billion, eight hundred forty-two million, nine hundred eighty-one thousand, two hundred forty-eight".