684445645144 has 32 divisors (see below), whose sum is σ = 1286210016000. Its totient is φ = 341456594080.

The previous prime is 684445645141. The next prime is 684445645151. The reversal of 684445645144 is 441546544486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684445645141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23266557 + ... + 23295955.

It is an arithmetic number, because the mean of its divisors is an integer number (40194063000).

Almost surely, 2^684445645144 is an apocalyptic number.

It is an amenable number.

684445645144 is a deficient number, since it is larger than the sum of its proper divisors (601764370856).

684445645144 is a wasteful number, since it uses less digits than its factorization.

684445645144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35823 (or 35819 counting only the distinct ones).

The product of its digits is 29491200, while the sum is 55.

The spelling of 684445645144 in words is "six hundred eighty-four billion, four hundred forty-five million, six hundred forty-five thousand, one hundred forty-four".