3911338481893 has 16 divisors (see below), whose sum is σ = 4219926899760. Its totient is φ = 3611485536256.

The previous prime is 3911338481887. The next prime is 3911338481923. The reversal of 3911338481893 is 3981848331193.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 103540437729 + 3807798044164 = 321777^2 + 1951358^2 .

It is a cyclic number.

It is not a de Polignac number, because 3911338481893 - 2¹³ = 3911338473701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3911338481993) 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, 10426773 + ... + 10795381.

It is an arithmetic number, because the mean of its divisors is an integer number (263745431235).

Almost surely, 2^{3911338481893} is an apocalyptic number.

It is an amenable number.

3911338481893 is a deficient number, since it is larger than the sum of its proper divisors (308588417867).

3911338481893 is a wasteful number, since it uses less digits than its factorization.

3911338481893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380456.

The product of its digits is 13436928, while the sum is 61.

The spelling of 3911338481893 in words is "three trillion, nine hundred eleven billion, three hundred thirty-eight million, four hundred eighty-one thousand, eight hundred ninety-three".