3864728862665 has 8 divisors (see below), whose sum is σ = 5059281420288. Its totient is φ = 2810711900080.

The previous prime is 3864728862661. The next prime is 3864728862667. The reversal of 3864728862665 is 5662688274683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3864728862665 - 2² = 3864728862661 is a prime.

It is a super-2 number, since 2×3864728862665² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3864728862661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35133898697 + ... + 35133898806.

It is an arithmetic number, because the mean of its divisors is an integer number (632410177536).

Almost surely, 2^{3864728862665} is an apocalyptic number.

It is an amenable number.

3864728862665 is a deficient number, since it is larger than the sum of its proper divisors (1194552557623).

3864728862665 is a wasteful number, since it uses less digits than its factorization.

3864728862665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70267797519.

The product of its digits is 1114767360, while the sum is 71.

The spelling of 3864728862665 in words is "three trillion, eight hundred sixty-four billion, seven hundred twenty-eight million, eight hundred sixty-two thousand, six hundred sixty-five".