16488408989 has 4 divisors (see below), whose sum is σ = 17756748156. Its totient is φ = 15220069824.

The previous prime is 16488408977. The next prime is 16488409037. The reversal of 16488408989 is 98980488461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11263576900 + 5224832089 = 106130^2 + 72283^2 .

It is a cyclic number.

It is not a de Polignac number, because 16488408989 - 2¹² = 16488404893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16488408949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634169564 + ... + 634169589.

It is an arithmetic number, because the mean of its divisors is an integer number (4439187039).

Almost surely, 2^16488408989 is an apocalyptic number.

It is an amenable number.

16488408989 is a deficient number, since it is larger than the sum of its proper divisors (1268339167).

16488408989 is a wasteful number, since it uses less digits than its factorization.

16488408989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268339166.

The product of its (nonzero) digits is 31850496, while the sum is 65.

The spelling of 16488408989 in words is "sixteen billion, four hundred eighty-eight million, four hundred eight thousand, nine hundred eighty-nine".