2331989911440 has 640 divisors, whose sum is σ = 9318981166080. Its totient is φ = 524971819008.

The previous prime is 2331989911439. The next prime is 2331989911453. The reversal of 2331989911440 is 441199891332.

2331989911440 is a `hidden beast` number, since 2 + 3 + 3 + 198 + 9 + 9 + 1 + 1 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1206408714 + ... + 1206410646.

It is an arithmetic number, because the mean of its divisors is an integer number (14560908072).

Almost surely, 2^{2331989911440} is an apocalyptic number.

2331989911440 is a gapful number since it is divisible by the number (20) 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 2331989911440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4659490583040).

2331989911440 is an abundant number, since it is smaller than the sum of its proper divisors (6986991254640).

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

2331989911440 is a wasteful number, since it uses less digits than its factorization.

2331989911440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 2331989911440 in words is "two trillion, three hundred thirty-one billion, nine hundred eighty-nine million, nine hundred eleven thousand, four hundred forty".