16510420011 has 8 divisors (see below), whose sum is σ = 22550817744. Its totient is φ = 10738484480.

The previous prime is 16510419973. The next prime is 16510420039. The reversal of 16510420011 is 11002401561.

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

It is a cyclic number.

It is not a de Polignac number, because 16510420011 - 2¹⁰ = 16510418987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16510420011.

It is not an unprimeable number, because it can be changed into a prime (16510422011) 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, 67115406 + ... + 67115651.

It is an arithmetic number, because the mean of its divisors is an integer number (2818852218).

Almost surely, 2^16510420011 is an apocalyptic number.

16510420011 is a deficient number, since it is larger than the sum of its proper divisors (6040397733).

16510420011 is a wasteful number, since it uses less digits than its factorization.

16510420011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134231101.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 16510420011 its reverse (11002401561), we get a palindrome (27512821572).

The spelling of 16510420011 in words is "sixteen billion, five hundred ten million, four hundred twenty thousand, eleven".