16381809423 has 48 divisors (see below), whose sum is σ = 27212080896. Its totient is φ = 9302688000.

The previous prime is 16381809413. The next prime is 16381809427. The reversal of 16381809423 is 32490818361.

16381809423 is a `hidden beast` number, since 1 + 638 + 1 + 8 + 0 + 9 + 4 + 2 + 3 = 666.

It is not a de Polignac number, because 16381809423 - 2¹⁶ = 16381743887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16381809427) 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, 9376236 + ... + 9377982.

It is an arithmetic number, because the mean of its divisors is an integer number (566918352).

Almost surely, 2^16381809423 is an apocalyptic number.

16381809423 is a deficient number, since it is larger than the sum of its proper divisors (10830271473).

16381809423 is a wasteful number, since it uses less digits than its factorization.

16381809423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604 (or 2601 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 16381809423 in words is "sixteen billion, three hundred eighty-one million, eight hundred nine thousand, four hundred twenty-three".