988191191889 has 192 divisors, whose sum is σ = 1735299072000. Its totient is φ = 535140587520.

The previous prime is 988191191881. The next prime is 988191191893.

988191191889 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 988191191889 - 2³ = 988191191881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (988191191881) 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 in 191 ways as a sum of consecutive naturals, for example, 464156377 + ... + 464158505.

It is an arithmetic number, because the mean of its divisors is an integer number (9038016000).

Almost surely, 2^988191191889 is an apocalyptic number.

988191191889 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

988191191889 is a deficient number, since it is larger than the sum of its proper divisors (747107880111).

988191191889 is a wasteful number, since it uses less digits than its factorization.

988191191889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388 (or 2385 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 72.

The spelling of 988191191889 in words is "nine hundred eighty-eight billion, one hundred ninety-one million, one hundred ninety-one thousand, eight hundred eighty-nine".