988785000661 has 2 divisors, whose sum is σ = 988785000662. Its totient is φ = 988785000660.

The previous prime is 988785000647. The next prime is 988785000683. The reversal of 988785000661 is 166000587889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982465545636 + 6319455025 = 991194^2 + 79495^2 .

It is a cyclic number.

It is not a de Polignac number, because 988785000661 - 2¹³ = 988784992469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 988785000596 and 988785000605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988785000631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494392500330 + 494392500331.

It is an arithmetic number, because the mean of its divisors is an integer number (494392500331).

Almost surely, 2^988785000661 is an apocalyptic number.

It is an amenable number.

988785000661 is a deficient number, since it is larger than the sum of its proper divisors (1).

988785000661 is an equidigital number, since it uses as much as digits as its factorization.

988785000661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 988785000661 in words is "nine hundred eighty-eight billion, seven hundred eighty-five million, six hundred sixty-one", and thus it is an aban number.