386893821565 has 12 divisors (see below), whose sum is σ = 472008405492. Its totient is φ = 304441025280.

The previous prime is 386893821553. The next prime is 386893821583. The reversal of 386893821565 is 565128398683.

It can be written as a sum of positive squares in 6 ways, for example, as 101569052601 + 285324768964 = 318699^2 + 534158^2 .

It is not a de Polignac number, because 386893821565 - 2⁵ = 386893821533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 386893821497 and 386893821506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10378972 + ... + 10416181.

It is an arithmetic number, because the mean of its divisors is an integer number (39334033791).

Almost surely, 2^386893821565 is an apocalyptic number.

It is an amenable number.

386893821565 is a deficient number, since it is larger than the sum of its proper divisors (85114583927).

386893821565 is an equidigital number, since it uses as much as digits as its factorization.

386893821565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20795280 (or 20795219 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 64.

The spelling of 386893821565 in words is "three hundred eighty-six billion, eight hundred ninety-three million, eight hundred twenty-one thousand, five hundred sixty-five".