2001144438624 has 24 divisors (see below), whose sum is σ = 5253004151640. Its totient is φ = 667048146176.

The previous prime is 2001144438613. The next prime is 2001144438641. The reversal of 2001144438624 is 4268344411002.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10422627189 + ... + 10422627380.

It is an arithmetic number, because the mean of its divisors is an integer number (218875172985).

Almost surely, 2^{2001144438624} is an apocalyptic number.

2001144438624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2001144438624 is an abundant number, since it is smaller than the sum of its proper divisors (3251859713016).

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

2001144438624 is a wasteful number, since it uses less digits than its factorization.

2001144438624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20845254582 (or 20845254574 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

Adding to 2001144438624 its reverse (4268344411002), we get a palindrome (6269488849626).

The spelling of 2001144438624 in words is "two trillion, one billion, one hundred forty-four million, four hundred thirty-eight thousand, six hundred twenty-four".