2001856383860 has 48 divisors (see below), whose sum is σ = 4344542736912. Its totient is φ = 774298828800.

The previous prime is 2001856383859. The next prime is 2001856383881. The reversal of 2001856383860 is 683836581002.

It can be written as a sum of positive squares in 8 ways, for example, as 580711057936 + 1421145325924 = 762044^2 + 1192118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001856383799 and 2001856383808.

It is a congruent number.

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, 10709501 + ... + 10894820.

It is an arithmetic number, because the mean of its divisors is an integer number (90511307019).

Almost surely, 2^{2001856383860} is an apocalyptic number.

2001856383860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001856383860 is an abundant number, since it is smaller than the sum of its proper divisors (2342686353052).

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

2001856383860 is a wasteful number, since it uses less digits than its factorization.

2001856383860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21604484 (or 21604482 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 2001856383860 in words is "two trillion, one billion, eight hundred fifty-six million, three hundred eighty-three thousand, eight hundred sixty".