3864728815401 has 4 divisors (see below), whose sum is σ = 5152971753872. Its totient is φ = 2576485876932.

The previous prime is 3864728815399. The next prime is 3864728815417. The reversal of 3864728815401 is 1045188274683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3864728815401 - 2¹ = 3864728815399 is a prime.

It is a super-2 number, since 2×3864728815401² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3864728815001) 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, 644121469231 + ... + 644121469236.

It is an arithmetic number, because the mean of its divisors is an integer number (1288242938468).

Almost surely, 2^{3864728815401} is an apocalyptic number.

It is an amenable number.

3864728815401 is a deficient number, since it is larger than the sum of its proper divisors (1288242938471).

3864728815401 is a wasteful number, since it uses less digits than its factorization.

3864728815401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288242938470.

The product of its (nonzero) digits is 10321920, while the sum is 57.

The spelling of 3864728815401 in words is "three trillion, eight hundred sixty-four billion, seven hundred twenty-eight million, eight hundred fifteen thousand, four hundred one".