1681308753140 has 24 divisors (see below), whose sum is σ = 3543776984832. Its totient is φ = 670041862560.

The previous prime is 1681308753121. The next prime is 1681308753143. The reversal of 1681308753140 is 413578031861.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681308753143) 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, 155096864 + ... + 155107703.

It is an arithmetic number, because the mean of its divisors is an integer number (147657374368).

Almost surely, 2^{1681308753140} is an apocalyptic number.

1681308753140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1681308753140 is an abundant number, since it is smaller than the sum of its proper divisors (1862468231692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1681308753140 is a wasteful number, since it uses less digits than its factorization.

1681308753140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310204847 (or 310204845 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 1681308753140 in words is "one trillion, six hundred eighty-one billion, three hundred eight million, seven hundred fifty-three thousand, one hundred forty".