2211818578944 has 704 divisors, whose sum is σ = 6955128778752. Its totient is φ = 618607411200.

The previous prime is 2211818578829. The next prime is 2211818579081. The reversal of 2211818578944 is 4498758181122.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4797870874 + ... + 4797871334.

It is an arithmetic number, because the mean of its divisors is an integer number (9879444288).

Almost surely, 2^{2211818578944} is an apocalyptic number.

2211818578944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2211818578944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3477564389376).

2211818578944 is an abundant number, since it is smaller than the sum of its proper divisors (4743310199808).

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

2211818578944 is a wasteful number, since it uses less digits than its factorization.

2211818578944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 724 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 60.

The spelling of 2211818578944 in words is "two trillion, two hundred eleven billion, eight hundred eighteen million, five hundred seventy-eight thousand, nine hundred forty-four".