685615436938 has 8 divisors (see below), whose sum is σ = 1061598096000. Its totient is φ = 331749404940.

The previous prime is 685615436927. The next prime is 685615437061. The reversal of 685615436938 is 839634516586.

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

It is a self number, because there is not a number n which added to its sum of digits gives 685615436938.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5529156688 + ... + 5529156811.

It is an arithmetic number, because the mean of its divisors is an integer number (132699762000).

Almost surely, 2^685615436938 is an apocalyptic number.

685615436938 is a deficient number, since it is larger than the sum of its proper divisors (375982659062).

685615436938 is a wasteful number, since it uses less digits than its factorization.

685615436938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11058313532.

The product of its digits is 111974400, while the sum is 64.

The spelling of 685615436938 in words is "six hundred eighty-five billion, six hundred fifteen million, four hundred thirty-six thousand, nine hundred thirty-eight".