3864807065081 has 4 divisors (see below), whose sum is σ = 3864813262464. Its totient is φ = 3864800867700.

The previous prime is 3864807065051. The next prime is 3864807065137. The reversal of 3864807065081 is 1805607084683.

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 a cyclic number.

It is not a de Polignac number, because 3864807065081 - 2⁶ = 3864807065017 is a prime.

It is a super-2 number, since 2×3864807065081² (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 (3864807065051) 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, 2043485 + ... + 3450426.

It is an arithmetic number, because the mean of its divisors is an integer number (966203315616).

Almost surely, 2^{3864807065081} is an apocalyptic number.

It is an amenable number.

3864807065081 is a deficient number, since it is larger than the sum of its proper divisors (6197383).

3864807065081 is an equidigital number, since it uses as much as digits as its factorization.

3864807065081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6197382.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 3864807065081 in words is "three trillion, eight hundred sixty-four billion, eight hundred seven million, sixty-five thousand, eighty-one".