3864728832361 has 4 divisors (see below), whose sum is σ = 3864732781012. Its totient is φ = 3864724883712.

The previous prime is 3864728832353. The next prime is 3864728832379. The reversal of 3864728832361 is 1632388274683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1059334977600 + 2805393854761 = 1029240^2 + 1674931^2 .

It is a cyclic number.

It is not a de Polignac number, because 3864728832361 - 2³ = 3864728832353 is a prime.

It is a super-2 number, since 2×3864728832361² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3864728832361.

It is not an unprimeable number, because it can be changed into a prime (3864728832061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713725 + ... + 2870341.

It is an arithmetic number, because the mean of its divisors is an integer number (966183195253).

Almost surely, 2^{3864728832361} is an apocalyptic number.

It is an amenable number.

3864728832361 is a deficient number, since it is larger than the sum of its proper divisors (3948651).

3864728832361 is a wasteful number, since it uses less digits than its factorization.

3864728832361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948650.

The product of its digits is 55738368, while the sum is 61.

The spelling of 3864728832361 in words is "three trillion, eight hundred sixty-four billion, seven hundred twenty-eight million, eight hundred thirty-two thousand, three hundred sixty-one".