2081645633836 has 24 divisors (see below), whose sum is σ = 3760459081344. Its totient is φ = 1007229949440.

The previous prime is 2081645633803. The next prime is 2081645633959. The reversal of 2081645633836 is 6383365461802.

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 7 ways as a sum of consecutive naturals, for example, 9179676 + ... + 9403708.

It is an arithmetic number, because the mean of its divisors is an integer number (156685795056).

Almost surely, 2^{2081645633836} is an apocalyptic number.

It is an amenable number.

2081645633836 is a deficient number, since it is larger than the sum of its proper divisors (1678813447508).

2081645633836 is a wasteful number, since it uses less digits than its factorization.

2081645633836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299001 (or 298999 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 2081645633836 in words is "two trillion, eighty-one billion, six hundred forty-five million, six hundred thirty-three thousand, eight hundred thirty-six".