1781368678040 has 64 divisors (see below), whose sum is σ = 4582023586560. Its totient is φ = 610573472640.

The previous prime is 1781368678021. The next prime is 1781368678049. The reversal of 1781368678040 is 408768631871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1781368678049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239 + ... + 1887521.

It is an arithmetic number, because the mean of its divisors is an integer number (71594118540).

Almost surely, 2^{1781368678040} is an apocalyptic number.

1781368678040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1781368678040 is an abundant number, since it is smaller than the sum of its proper divisors (2800654908520).

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

1781368678040 is a wasteful number, since it uses less digits than its factorization.

1781368678040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890672 (or 1890668 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 1781368678040 in words is "one trillion, seven hundred eighty-one billion, three hundred sixty-eight million, six hundred seventy-eight thousand, forty".