685038528158 has 4 divisors (see below), whose sum is σ = 1027557792240. Its totient is φ = 342519264078.

The previous prime is 685038528157. The next prime is 685038528199. The reversal of 685038528158 is 851825830586.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 685038528097 and 685038528106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685038528157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171259632038 + ... + 171259632041.

It is an arithmetic number, because the mean of its divisors is an integer number (256889448060).

Almost surely, 2^685038528158 is an apocalyptic number.

685038528158 is a deficient number, since it is larger than the sum of its proper divisors (342519264082).

685038528158 is a wasteful number, since it uses less digits than its factorization.

685038528158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342519264081.

The product of its (nonzero) digits is 18432000, while the sum is 59.

The spelling of 685038528158 in words is "six hundred eighty-five billion, thirty-eight million, five hundred twenty-eight thousand, one hundred fifty-eight".