989661019347 has 144 divisors (see below), whose sum is σ = 1931898428928. Its totient is φ = 474068574720.

The previous prime is 989661019339. The next prime is 989661019423. The reversal of 989661019347 is 743910166989.

989661019347 is a `hidden beast` number, since 9 + 8 + 9 + 6 + 610 + 1 + 9 + 3 + 4 + 7 = 666.

It is not a de Polignac number, because 989661019347 - 2³ = 989661019339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (989661019307) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 128473498 + ... + 128481200.

It is an arithmetic number, because the mean of its divisors is an integer number (13415961312).

Almost surely, 2^989661019347 is an apocalyptic number.

989661019347 is a deficient number, since it is larger than the sum of its proper divisors (942237409581).

989661019347 is a wasteful number, since it uses less digits than its factorization.

989661019347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8850 (or 8834 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 989661019347 in words is "nine hundred eighty-nine billion, six hundred sixty-one million, nineteen thousand, three hundred forty-seven".