989661134534 has 16 divisors (see below), whose sum is σ = 1488204515088. Its totient is φ = 493594278912.

The previous prime is 989661134533. The next prime is 989661134597. The reversal of 989661134534 is 435431166989.

It is a super-2 number, since 2×989661134534² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989661134533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1180202 + ... + 1836354.

It is an arithmetic number, because the mean of its divisors is an integer number (93012782193).

Almost surely, 2^989661134534 is an apocalyptic number.

989661134534 is a deficient number, since it is larger than the sum of its proper divisors (498543380554).

989661134534 is a wasteful number, since it uses less digits than its factorization.

989661134534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658039.

The product of its digits is 16796160, while the sum is 59.

The spelling of 989661134534 in words is "nine hundred eighty-nine billion, six hundred sixty-one million, one hundred thirty-four thousand, five hundred thirty-four".