684745881356 has 12 divisors (see below), whose sum is σ = 1198375763592. Its totient is φ = 342352806048.

The previous prime is 684745881319. The next prime is 684745881359. The reversal of 684745881356 is 653188547486.

It is a junction number, because it is equal to n+sod(n) for n = 684745881292 and 684745881301.

It is not an unprimeable number, because it can be changed into a prime (684745881359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4957010 + ... + 5093273.

It is an arithmetic number, because the mean of its divisors is an integer number (99864646966).

Almost surely, 2^684745881356 is an apocalyptic number.

It is an amenable number.

684745881356 is a deficient number, since it is larger than the sum of its proper divisors (513629882236).

684745881356 is a wasteful number, since it uses less digits than its factorization.

684745881356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10067320 (or 10067318 counting only the distinct ones).

The product of its digits is 154828800, while the sum is 65.

The spelling of 684745881356 in words is "six hundred eighty-four billion, seven hundred forty-five million, eight hundred eighty-one thousand, three hundred fifty-six".