2081655456 has 96 divisors (see below), whose sum is σ = 5772146688. Its totient is φ = 655845120.

The previous prime is 2081655431. The next prime is 2081655469. The reversal of 2081655456 is 6545561802.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119835 + ... + 136101.

It is an arithmetic number, because the mean of its divisors is an integer number (60126528).

Almost surely, 2^2081655456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2081655456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2886073344).

2081655456 is an abundant number, since it is smaller than the sum of its proper divisors (3690491232).

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

2081655456 is a wasteful number, since it uses less digits than its factorization.

2081655456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16354 (or 16346 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 2081655456 is about 45625.1625312174. The cubic root of 2081655456 is about 1276.8394223731.

The spelling of 2081655456 in words is "two billion, eighty-one million, six hundred fifty-five thousand, four hundred fifty-six".