1017800985689 has 16 divisors (see below), whose sum is σ = 1134450852480. Its totient is φ = 907465224960.

The previous prime is 1017800985683. The next prime is 1017800985731. The reversal of 1017800985689 is 9865890087101.

It is a cyclic number.

It is not a de Polignac number, because 1017800985689 - 2⁴ = 1017800985673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1017800985683) 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, 7005347 + ... + 7149159.

It is an arithmetic number, because the mean of its divisors is an integer number (70903178280).

Almost surely, 2^{1017800985689} is an apocalyptic number.

1017800985689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1017800985689 is a deficient number, since it is larger than the sum of its proper divisors (116649866791).

1017800985689 is a wasteful number, since it uses less digits than its factorization.

1017800985689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165760.

The product of its (nonzero) digits is 8709120, while the sum is 62.

The spelling of 1017800985689 in words is "one trillion, seventeen billion, eight hundred million, nine hundred eighty-five thousand, six hundred eighty-nine".