685755500 has 24 divisors (see below), whose sum is σ = 1497691104. Its totient is φ = 274302000.

The previous prime is 685755461. The next prime is 685755517. The reversal of 685755500 is 5557586.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685256 + ... + 686255.

It is an arithmetic number, because the mean of its divisors is an integer number (62403796).

Almost surely, 2^685755500 is an apocalyptic number.

It is an amenable number.

685755500 is an abundant number, since it is smaller than the sum of its proper divisors (811935604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685755500 is a wasteful number, since it uses less digits than its factorization.

685755500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371530 (or 1371518 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 41.

The square root of 685755500 is about 26186.9337647614. The cubic root of 685755500 is about 881.8399433272.

The spelling of 685755500 in words is "six hundred eighty-five million, seven hundred fifty-five thousand, five hundred".