16487251665 has 8 divisors (see below), whose sum is σ = 26379602688. Its totient is φ = 8793200880.

The previous prime is 16487251663. The next prime is 16487251679. The reversal of 16487251665 is 56615278461.

It is a happy number.

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

It is not a de Polignac number, because 16487251665 - 2¹ = 16487251663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16487251663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549575041 + ... + 549575070.

It is an arithmetic number, because the mean of its divisors is an integer number (3297450336).

Almost surely, 2^16487251665 is an apocalyptic number.

16487251665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16487251665 is a deficient number, since it is larger than the sum of its proper divisors (9892351023).

16487251665 is a wasteful number, since it uses less digits than its factorization.

16487251665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099150119.

The product of its digits is 2419200, while the sum is 51.

The spelling of 16487251665 in words is "sixteen billion, four hundred eighty-seven million, two hundred fifty-one thousand, six hundred sixty-five".