2001259549620 has 480 divisors, whose sum is σ = 6715538565120. Its totient is φ = 497419211520.

The previous prime is 2001259549589. The next prime is 2001259549633. The reversal of 2001259549620 is 269459521002.

2001259549620 is a `hidden beast` number, since 2 + 0 + 0 + 12 + 5 + 9 + 5 + 4 + 9 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2069554377 + ... + 2069555343.

It is an arithmetic number, because the mean of its divisors is an integer number (13990705344).

Almost surely, 2^{2001259549620} is an apocalyptic number.

2001259549620 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 2001259549620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3357769282560).

2001259549620 is an abundant number, since it is smaller than the sum of its proper divisors (4714279015500).

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

2001259549620 is a wasteful number, since it uses less digits than its factorization.

2001259549620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025 (or 2014 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 2001259549620 in words is "two trillion, one billion, two hundred fifty-nine million, five hundred forty-nine thousand, six hundred twenty".