989506228851 has 12 divisors (see below), whose sum is σ = 1633470600112. Its totient is φ = 565432130736.

The previous prime is 989506228771. The next prime is 989506228877. The reversal of 989506228851 is 158822605989.

It is not a de Polignac number, because 989506228851 - 2²⁹ = 988969357939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 15706448077 = 989506228851 / (9 + 8 + 9 + 5 + 0 + 6 + 2 + 2 + 8 + 8 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989506228951) 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, 7853223976 + ... + 7853224101.

Almost surely, 2^989506228851 is an apocalyptic number.

989506228851 is a deficient number, since it is larger than the sum of its proper divisors (643964371261).

989506228851 is a wasteful number, since it uses less digits than its factorization.

989506228851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15706448090 (or 15706448087 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 63.

The spelling of 989506228851 in words is "nine hundred eighty-nine billion, five hundred six million, two hundred twenty-eight thousand, eight hundred fifty-one".