385320320687 has 4 divisors (see below), whose sum is σ = 391851173640. Its totient is φ = 378789467736.

The previous prime is 385320320633. The next prime is 385320320711. The reversal of 385320320687 is 786023023583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786023023583 = 7 ⋅112289003369.

It is a cyclic number.

It is not a de Polignac number, because 385320320687 - 2²⁰ = 385319272111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385325320687) 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, 3265426388 + ... + 3265426505.

It is an arithmetic number, because the mean of its divisors is an integer number (97962793410).

Almost surely, 2^385320320687 is an apocalyptic number.

385320320687 is a deficient number, since it is larger than the sum of its proper divisors (6530852953).

385320320687 is an equidigital number, since it uses as much as digits as its factorization.

385320320687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530852952.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 385320320687 in words is "three hundred eighty-five billion, three hundred twenty million, three hundred twenty thousand, six hundred eighty-seven".