681554067548 has 24 divisors (see below), whose sum is σ = 1225227673152. Its totient is φ = 331493114304.

The previous prime is 681554067479. The next prime is 681554067583. The reversal of 681554067548 is 845760455186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158765 + ... + 1178267.

It is an arithmetic number, because the mean of its divisors is an integer number (51051153048).

Almost surely, 2^681554067548 is an apocalyptic number.

It is an amenable number.

681554067548 is a deficient number, since it is larger than the sum of its proper divisors (543673605604).

681554067548 is a wasteful number, since it uses less digits than its factorization.

681554067548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024061 (or 1024059 counting only the distinct ones).

The product of its (nonzero) digits is 32256000, while the sum is 59.

The spelling of 681554067548 in words is "six hundred eighty-one billion, five hundred fifty-four million, sixty-seven thousand, five hundred forty-eight".