16381454639 has 16 divisors (see below), whose sum is σ = 17935689984. Its totient is φ = 14838163200.

The previous prime is 16381454633. The next prime is 16381454659. The reversal of 16381454639 is 93645418361.

16381454639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16381454639 - 2¹² = 16381450543 is a prime.

It is a super-2 number, since 2×16381454639² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16381454633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3869654 + ... + 3873884.

It is an arithmetic number, because the mean of its divisors is an integer number (1120980624).

Almost surely, 2^16381454639 is an apocalyptic number.

16381454639 is a deficient number, since it is larger than the sum of its proper divisors (1554235345).

16381454639 is a wasteful number, since it uses less digits than its factorization.

16381454639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5438.

The product of its digits is 1866240, while the sum is 50.

The spelling of 16381454639 in words is "sixteen billion, three hundred eighty-one million, four hundred fifty-four thousand, six hundred thirty-nine".