2211591397484 has 144 divisors (see below), whose sum is σ = 4786345267200. Its totient is φ = 889021961856.

The previous prime is 2211591397459. The next prime is 2211591397493. The reversal of 2211591397484 is 4847931951122.

It is a super-2 number, since 2×2211591397484² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240725939 + ... + 240735125.

It is an arithmetic number, because the mean of its divisors is an integer number (33238508800).

Almost surely, 2^{2211591397484} 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 2211591397484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2393172633600).

2211591397484 is an abundant number, since it is smaller than the sum of its proper divisors (2574753869716).

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

2211591397484 is a wasteful number, since it uses less digits than its factorization.

2211591397484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9860 (or 9851 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The spelling of 2211591397484 in words is "two trillion, two hundred eleven billion, five hundred ninety-one million, three hundred ninety-seven thousand, four hundred eighty-four".