686445189933 has 16 divisors (see below), whose sum is σ = 963504515520. Its totient is φ = 433511629056.

The previous prime is 686445189931. The next prime is 686445189973. The reversal of 686445189933 is 339981544686.

It is not a de Polignac number, because 686445189933 - 2¹ = 686445189931 is a prime.

It is a super-3 number, since 3×686445189933³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686445189931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319591 + ... + 1214507.

It is an arithmetic number, because the mean of its divisors is an integer number (60219032220).

Almost surely, 2^686445189933 is an apocalyptic number.

It is an amenable number.

686445189933 is a deficient number, since it is larger than the sum of its proper divisors (277059325587).

686445189933 is a wasteful number, since it uses less digits than its factorization.

686445189933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908396.

The product of its digits is 134369280, while the sum is 66.

The spelling of 686445189933 in words is "six hundred eighty-six billion, four hundred forty-five million, one hundred eighty-nine thousand, nine hundred thirty-three".