3864728861773 has 24 divisors (see below), whose sum is σ = 4433283434088. Its totient is φ = 3355902830592.

The previous prime is 3864728861753. The next prime is 3864728861803. The reversal of 3864728861773 is 3771688274683.

It can be written as a sum of positive squares in 12 ways, for example, as 537249418729 + 3327479443044 = 732973^2 + 1824138^2 .

It is not a de Polignac number, because 3864728861773 - 2¹³ = 3864728853581 is a prime.

It is a super-2 number, since 2×3864728861773² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864728861753) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5388411 + ... + 6063367.

It is an arithmetic number, because the mean of its divisors is an integer number (184720143087).

Almost surely, 2^{3864728861773} is an apocalyptic number.

It is an amenable number.

3864728861773 is a deficient number, since it is larger than the sum of its proper divisors (568554572315).

3864728861773 is a wasteful number, since it uses less digits than its factorization.

3864728861773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676993 (or 676980 counting only the distinct ones).

The product of its digits is 455196672, while the sum is 70.

The spelling of 3864728861773 in words is "three trillion, eight hundred sixty-four billion, seven hundred twenty-eight million, eight hundred sixty-one thousand, seven hundred seventy-three".