16489969638 has 32 divisors (see below), whose sum is σ = 35732036736. Its totient is φ = 5053012608.

The previous prime is 16489969637. The next prime is 16489969663. The reversal of 16489969638 is 83696998461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16489969637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1875456 + ... + 1884227.

It is an arithmetic number, because the mean of its divisors is an integer number (1116626148).

Almost surely, 2^16489969638 is an apocalyptic number.

16489969638 is an abundant number, since it is smaller than the sum of its proper divisors (19242067098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16489969638 is a wasteful number, since it uses less digits than its factorization.

16489969638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759748.

The product of its digits is 120932352, while the sum is 69.

The spelling of 16489969638 in words is "sixteen billion, four hundred eighty-nine million, nine hundred sixty-nine thousand, six hundred thirty-eight".