988888887777771 has 12 divisors (see below), whose sum is σ = 1512418298954472. Its totient is φ = 620479302134976.

The previous prime is 988888887777761. The next prime is 988888887777793. The reversal of 988888887777771 is 177777788888889.

It is a de Polignac number, because none of the positive numbers 2^k-988888887777771 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (988888887777761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3231663031801 + ... + 3231663032106.

It is an arithmetic number, because the mean of its divisors is an integer number (126034858246206).

Almost surely, 2^{988888887777771} is an apocalyptic number.

988888887777771 is a deficient number, since it is larger than the sum of its proper divisors (523529411176701).

988888887777771 is a wasteful number, since it uses less digits than its factorization.

988888887777771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463326063930 (or 6463326063927 counting only the distinct ones).

The product of its digits is 2220550520832, while the sum is 108.

The spelling of 988888887777771 in words is "nine hundred eighty-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-seven million, seven hundred seventy-seven thousand, seven hundred seventy-one".