2001043720260 has 864 divisors, whose sum is σ = 7224339507840. Its totient is φ = 461477855232.

The previous prime is 2001043720243. The next prime is 2001043720297. The reversal of 2001043720260 is 620273401002.

2001043720260 is a `hidden beast` number, since 20 + 0 + 1 + 0 + 437 + 202 + 6 + 0 = 666.

It is a super-2 number, since 2×2001043720260² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3468013092 + ... + 3468013668.

It is an arithmetic number, because the mean of its divisors is an integer number (8361504060).

Almost surely, 2^{2001043720260} is an apocalyptic number.

2001043720260 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 2001043720260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3612169753920).

2001043720260 is an abundant number, since it is smaller than the sum of its proper divisors (5223295787580).

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

2001043720260 is a wasteful number, since it uses less digits than its factorization.

2001043720260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The spelling of 2001043720260 in words is "two trillion, one billion, forty-three million, seven hundred twenty thousand, two hundred sixty".