16548989391 has 48 divisors (see below), whose sum is σ = 27241014528. Its totient is φ = 9956260800.

The previous prime is 16548989357. The next prime is 16548989411. The reversal of 16548989391 is 19398984561.

16548989391 is a `hidden beast` number, since 1 + 6 + 548 + 9 + 89 + 3 + 9 + 1 = 666.

It is not a de Polignac number, because 16548989391 - 2¹⁰ = 16548988367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16548989311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 343606 + ... + 388796.

It is an arithmetic number, because the mean of its divisors is an integer number (567521136).

Almost surely, 2^16548989391 is an apocalyptic number.

16548989391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16548989391 is a deficient number, since it is larger than the sum of its proper divisors (10692025137).

16548989391 is a wasteful number, since it uses less digits than its factorization.

16548989391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45354 (or 45342 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 16548989391 in words is "sixteen billion, five hundred forty-eight million, nine hundred eighty-nine thousand, three hundred ninety-one".