385109839871 has 4 divisors (see below), whose sum is σ = 385118142000. Its totient is φ = 385101537744.

The previous prime is 385109839861. The next prime is 385109839889. The reversal of 385109839871 is 178938901583.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 385109839871 - 2³⁴ = 367929970687 is a prime.

It is a super-2 number, since 2×385109839871² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385109839831) 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, 4081091 + ... + 4174388.

It is an arithmetic number, because the mean of its divisors is an integer number (96279535500).

Almost surely, 2^385109839871 is an apocalyptic number.

385109839871 is a deficient number, since it is larger than the sum of its proper divisors (8302129).

385109839871 is an equidigital number, since it uses as much as digits as its factorization.

385109839871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8302128.

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 385109839871 in words is "three hundred eighty-five billion, one hundred nine million, eight hundred thirty-nine thousand, eight hundred seventy-one".