685264217438 has 8 divisors (see below), whose sum is σ = 1028603760888. Its totient is φ = 342396297144.

The previous prime is 685264217437. The next prime is 685264217483. The reversal of 685264217438 is 834712462586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685264217437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117902156 + ... + 117907967.

It is an arithmetic number, because the mean of its divisors is an integer number (128575470111).

Almost surely, 2^685264217438 is an apocalyptic number.

685264217438 is a deficient number, since it is larger than the sum of its proper divisors (343339543450).

685264217438 is a wasteful number, since it uses less digits than its factorization.

685264217438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235811578.

The product of its digits is 15482880, while the sum is 56.

The spelling of 685264217438 in words is "six hundred eighty-five billion, two hundred sixty-four million, two hundred seventeen thousand, four hundred thirty-eight".