2081954578 has 16 divisors (see below), whose sum is σ = 3411720000. Its totient is φ = 944986000.

The previous prime is 2081954569. The next prime is 2081954587. The reversal of 2081954578 is 8754591802.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2081954569) and next prime (2081954587).

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 7 ways as a sum of consecutive naturals, for example, 52078 + ... + 82921.

It is an arithmetic number, because the mean of its divisors is an integer number (213232500).

Almost surely, 2^2081954578 is an apocalyptic number.

2081954578 is a deficient number, since it is larger than the sum of its proper divisors (1329765422).

2081954578 is a wasteful number, since it uses less digits than its factorization.

2081954578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135713.

The product of its (nonzero) digits is 806400, while the sum is 49.

The square root of 2081954578 is about 45628.4404511046. The cubic root of 2081954578 is about 1276.9005776215.

It can be divided in two parts, 2081 and 954578, that added together give a palindrome (956659).

The spelling of 2081954578 in words is "two billion, eighty-one million, nine hundred fifty-four thousand, five hundred seventy-eight".