3864751865811 has 16 divisors (see below), whose sum is σ = 5745789985920. Its totient is φ = 2567396994120.

The previous prime is 3864751865809. The next prime is 3864751865839. The reversal of 3864751865811 is 1185681574683.

It is a happy number.

3864751865811 is a `hidden beast` number, since 3 + 8 + 6 + 47 + 5 + 1 + 8 + 6 + 581 + 1 = 666.

It is not a de Polignac number, because 3864751865811 - 2¹ = 3864751865809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3864751865801) 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, 252888045 + ... + 252903326.

It is an arithmetic number, because the mean of its divisors is an integer number (359111874120).

Almost surely, 2^{3864751865811} is an apocalyptic number.

3864751865811 is a deficient number, since it is larger than the sum of its proper divisors (1881038120109).

3864751865811 is a wasteful number, since it uses less digits than its factorization.

3864751865811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505791663 (or 505791657 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 63.

The spelling of 3864751865811 in words is "three trillion, eight hundred sixty-four billion, seven hundred fifty-one million, eight hundred sixty-five thousand, eight hundred eleven".