1244205944864 has 96 divisors (see below), whose sum is σ = 2649567303936. Its totient is φ = 572885913600.

The previous prime is 1244205944783. The next prime is 1244205944873. The reversal of 1244205944864 is 4684495024421.

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, 161100107 + ... + 161107829.

It is an arithmetic number, because the mean of its divisors is an integer number (27599659416).

Almost surely, 2^{1244205944864} 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 1244205944864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324783651968).

1244205944864 is an abundant number, since it is smaller than the sum of its proper divisors (1405361359072).

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

1244205944864 is a wasteful number, since it uses less digits than its factorization.

1244205944864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14098 (or 14090 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 53.

The spelling of 1244205944864 in words is "one trillion, two hundred forty-four billion, two hundred five million, nine hundred forty-four thousand, eight hundred sixty-four".