2081881456640 has 72 divisors (see below), whose sum is σ = 4996498008600. Its totient is φ = 832752320512.

The previous prime is 2081881456619. The next prime is 2081881456691. The reversal of 2081881456640 is 466541881802.

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, 932990 + ... + 2243709.

It is an arithmetic number, because the mean of its divisors is an integer number (69395805675).

Almost surely, 2^{2081881456640} is an apocalyptic number.

2081881456640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2081881456640 is an abundant number, since it is smaller than the sum of its proper divisors (2914616551960).

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

2081881456640 is an frugal number, since it uses more digits than its factorization.

2081881456640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176738 (or 3176706 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 53.

The spelling of 2081881456640 in words is "two trillion, eighty-one billion, eight hundred eighty-one million, four hundred fifty-six thousand, six hundred forty".