128671857738548 has 24 divisors (see below), whose sum is σ = 225474433901640. Its totient is φ = 64250593003520.

The previous prime is 128671857738497. The next prime is 128671857738559. The reversal of 128671857738548 is 845837758176821.

It can be written as a sum of positive squares in 4 ways, for example, as 44852193163684 + 83819664574864 = 6697178^2 + 9155308^2 .

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, 304155140 + ... + 304577892.

It is an arithmetic number, because the mean of its divisors is an integer number (9394768079235).

Almost surely, 2^{128671857738548} is an apocalyptic number.

It is an amenable number.

128671857738548 is a deficient number, since it is larger than the sum of its proper divisors (96802576163092).

128671857738548 is a wasteful number, since it uses less digits than its factorization.

128671857738548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523507 (or 523505 counting only the distinct ones).

The product of its digits is 5057740800, while the sum is 80.

The spelling of 128671857738548 in words is "one hundred twenty-eight trillion, six hundred seventy-one billion, eight hundred fifty-seven million, seven hundred thirty-eight thousand, five hundred forty-eight".