385440266671 has 4 divisors (see below), whose sum is σ = 408113223552. Its totient is φ = 362767309792.

The previous prime is 385440266621. The next prime is 385440266677. The reversal of 385440266671 is 176662044583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176662044583 = 128147 ⋅1378589.

It is a cyclic number.

It is not a de Polignac number, because 385440266671 - 2¹⁷ = 385440135599 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 (385440266677) 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, 11336478415 + ... + 11336478448.

It is an arithmetic number, because the mean of its divisors is an integer number (102028305888).

Almost surely, 2^385440266671 is an apocalyptic number.

385440266671 is a deficient number, since it is larger than the sum of its proper divisors (22672956881).

385440266671 is a wasteful number, since it uses less digits than its factorization.

385440266671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22672956880.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 385440266671 in words is "three hundred eighty-five billion, four hundred forty million, two hundred sixty-six thousand, six hundred seventy-one".