4081721964 has 48 divisors (see below), whose sum is σ = 10140681600. Its totient is φ = 1273374976.

The previous prime is 4081721923. The next prime is 4081722023. The reversal of 4081721964 is 4691271804.

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, 19374 + ... + 92405.

It is an arithmetic number, because the mean of its divisors is an integer number (211264200).

Almost surely, 2^4081721964 is an apocalyptic number.

It is an amenable number.

4081721964 is an abundant number, since it is smaller than the sum of its proper divisors (6058959636).

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

4081721964 is a wasteful number, since it uses less digits than its factorization.

4081721964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111982 (or 111980 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 4081721964 is about 63888.3554648263. The cubic root of 4081721964 is about 1598.1387163332.

The spelling of 4081721964 in words is "four billion, eighty-one million, seven hundred twenty-one thousand, nine hundred sixty-four".