3804728505681 has 16 divisors (see below), whose sum is σ = 5113286975808. Its totient is φ = 2516339904000.

The previous prime is 3804728505679. The next prime is 3804728505769. The reversal of 3804728505681 is 1865058274083.

3804728505681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3804728505681 - 2¹ = 3804728505679 is a prime.

It is a super-2 number, since 2×3804728505681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3804728501681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240420 + ... + 2768981.

It is an arithmetic number, because the mean of its divisors is an integer number (319580435988).

Almost surely, 2^{3804728505681} is an apocalyptic number.

It is an amenable number.

3804728505681 is a deficient number, since it is larger than the sum of its proper divisors (1308558470127).

3804728505681 is a wasteful number, since it uses less digits than its factorization.

3804728505681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012752.

The product of its (nonzero) digits is 12902400, while the sum is 57.

The spelling of 3804728505681 in words is "three trillion, eight hundred four billion, seven hundred twenty-eight million, five hundred five thousand, six hundred eighty-one".