9988888801 has 2 divisors, whose sum is σ = 9988888802. Its totient is φ = 9988888800.

The previous prime is 9988888771. The next prime is 9988888817. The reversal of 9988888801 is 1088888899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9904230400 + 84658401 = 99520^2 + 9201^2 .

It is a cyclic number.

It is not a de Polignac number, because 9988888801 - 2⁵ = 9988888769 is a prime.

It is not a weakly prime, because it can be changed into another prime (9988888501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994444400 + 4994444401.

It is an arithmetic number, because the mean of its divisors is an integer number (4994444401).

Almost surely, 2^9988888801 is an apocalyptic number.

It is an amenable number.

9988888801 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988888801 is an equidigital number, since it uses as much as digits as its factorization.

9988888801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21233664, while the sum is 67.

The square root of 9988888801 is about 99944.4285640775. The cubic root of 9988888801 is about 2153.6364492260.

The spelling of 9988888801 in words is "nine billion, nine hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred one".