685536038813 has 16 divisors (see below), whose sum is σ = 741415762560. Its totient is φ = 632154321216.

The previous prime is 685536038713. The next prime is 685536038827. The reversal of 685536038813 is 318830635586.

It is a cyclic number.

It is not a de Polignac number, because 685536038813 - 2¹⁰ = 685536037789 is a prime.

It is a super-2 number, since 2×685536038813² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685536038843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3602495 + ... + 3788012.

It is an arithmetic number, because the mean of its divisors is an integer number (46338485160).

Almost surely, 2^685536038813 is an apocalyptic number.

It is an amenable number.

685536038813 is a deficient number, since it is larger than the sum of its proper divisors (55879723747).

685536038813 is a wasteful number, since it uses less digits than its factorization.

685536038813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7390676.

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 685536038813 in words is "six hundred eighty-five billion, five hundred thirty-six million, thirty-eight thousand, eight hundred thirteen".