2191490145888 has 192 divisors, whose sum is σ = 6169294720512. Its totient is φ = 679464529920.

The previous prime is 2191490145863. The next prime is 2191490145893. The reversal of 2191490145888 is 8885410941912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27752670 + ... + 27831522.

It is an arithmetic number, because the mean of its divisors is an integer number (32131743336).

Almost surely, 2^{2191490145888} 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 2191490145888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3084647360256).

2191490145888 is an abundant number, since it is smaller than the sum of its proper divisors (3977804574624).

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

2191490145888 is a wasteful number, since it uses less digits than its factorization.

2191490145888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79237 (or 79229 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 60.

The spelling of 2191490145888 in words is "two trillion, one hundred ninety-one billion, four hundred ninety million, one hundred forty-five thousand, eight hundred eighty-eight".