685628645 has 16 divisors (see below), whose sum is σ = 889335552. Its totient is φ = 504429120.

The previous prime is 685628633. The next prime is 685628651. The reversal of 685628645 is 546826586.

It is not a de Polignac number, because 685628645 - 2²⁰ = 684580069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 685628593 and 685628602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1847 + ... + 37076.

It is an arithmetic number, because the mean of its divisors is an integer number (55583472).

Almost surely, 2^685628645 is an apocalyptic number.

685628645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

685628645 is a deficient number, since it is larger than the sum of its proper divisors (203706907).

685628645 is a wasteful number, since it uses less digits than its factorization.

685628645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39212.

The product of its digits is 2764800, while the sum is 50.

The square root of 685628645 is about 26184.5115478597. The cubic root of 685628645 is about 881.7855640309.

The spelling of 685628645 in words is "six hundred eighty-five million, six hundred twenty-eight thousand, six hundred forty-five".