1078688721705 has 48 divisors (see below), whose sum is σ = 2012340651264. Its totient is φ = 491970581760.

The previous prime is 1078688721673. The next prime is 1078688721713. The reversal of 1078688721705 is 5071278868701.

It is not a de Polignac number, because 1078688721705 - 2⁵ = 1078688721673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1385772 + ... + 2019341.

It is an arithmetic number, because the mean of its divisors is an integer number (41923763568).

Almost surely, 2^{1078688721705} is an apocalyptic number.

1078688721705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1078688721705 is a deficient number, since it is larger than the sum of its proper divisors (933651929559).

1078688721705 is a wasteful number, since it uses less digits than its factorization.

1078688721705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405566 (or 3405559 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 60.

The spelling of 1078688721705 in words is "one trillion, seventy-eight billion, six hundred eighty-eight million, seven hundred twenty-one thousand, seven hundred five".