385327820497 has 4 divisors (see below), whose sum is σ = 389657346660. Its totient is φ = 380998294336.

The previous prime is 385327820491. The next prime is 385327820539. The reversal of 385327820497 is 794028723583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794028723583 = 31 ⋅25613829793.

It can be written as a sum of positive squares in 2 ways, for example, as 79041948736 + 306285871761 = 281144^2 + 553431^2 .

It is a cyclic number.

It is not a de Polignac number, because 385327820497 - 2¹⁵ = 385327787729 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385327820491) 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, 2164762948 + ... + 2164763125.

It is an arithmetic number, because the mean of its divisors is an integer number (97414336665).

Almost surely, 2^385327820497 is an apocalyptic number.

It is an amenable number.

385327820497 is a deficient number, since it is larger than the sum of its proper divisors (4329526163).

385327820497 is an equidigital number, since it uses as much as digits as its factorization.

385327820497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329526162.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 385327820497 in words is "three hundred eighty-five billion, three hundred twenty-seven million, eight hundred twenty thousand, four hundred ninety-seven".