3865264868557 has 4 divisors (see below), whose sum is σ = 3871849647456. Its totient is φ = 3858680089660.

The previous prime is 3865264868551. The next prime is 3865264868561. The reversal of 3865264868557 is 7558684625683.

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 3865264868557 - 2⁷ = 3865264868429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3865264868557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865264868551) 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, 3292388569 + ... + 3292389742.

It is an arithmetic number, because the mean of its divisors is an integer number (967962411864).

Almost surely, 2^{3865264868557} is an apocalyptic number.

It is an amenable number.

3865264868557 is a deficient number, since it is larger than the sum of its proper divisors (6584778899).

3865264868557 is an equidigital number, since it uses as much as digits as its factorization.

3865264868557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584778898.

The product of its digits is 2322432000, while the sum is 73.

The spelling of 3865264868557 in words is "three trillion, eight hundred sixty-five billion, two hundred sixty-four million, eight hundred sixty-eight thousand, five hundred fifty-seven".