2001312320064 has 112 divisors (see below), whose sum is σ = 5326938978816. Its totient is φ = 663101337600.

The previous prime is 2001312320017. The next prime is 2001312320081. The reversal of 2001312320064 is 4600232131002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79256689 + ... + 79281935.

It is an arithmetic number, because the mean of its divisors is an integer number (47561955168).

Almost surely, 2^{2001312320064} is an apocalyptic number.

2001312320064 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 2001312320064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2663469489408).

2001312320064 is an abundant number, since it is smaller than the sum of its proper divisors (3325626658752).

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

2001312320064 is a wasteful number, since it uses less digits than its factorization.

2001312320064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27724 (or 27714 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 2001312320064 its reverse (4600232131002), we get a palindrome (6601544451066).

The spelling of 2001312320064 in words is "two trillion, one billion, three hundred twelve million, three hundred twenty thousand, sixty-four".