16381307249 has 8 divisors (see below), whose sum is σ = 16443504000. Its totient is φ = 16319168496.

The previous prime is 16381307213. The next prime is 16381307251. The reversal of 16381307249 is 94270318361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16381307249 is a prime.

It is a super-2 number, since 2×16381307249² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16381307279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600347 + ... + 627039.

It is an arithmetic number, because the mean of its divisors is an integer number (2055438000).

Almost surely, 2^16381307249 is an apocalyptic number.

It is an amenable number.

16381307249 is a deficient number, since it is larger than the sum of its proper divisors (62196751).

16381307249 is a wasteful number, since it uses less digits than its factorization.

16381307249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28999.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 16381307249 in words is "sixteen billion, three hundred eighty-one million, three hundred seven thousand, two hundred forty-nine".