16161516610511 has 4 divisors (see below), whose sum is σ = 16233989779392. Its totient is φ = 16089043441632.

The previous prime is 16161516610501. The next prime is 16161516610513. The reversal of 16161516610511 is 11501661516161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16161516610511 - 2³⁴ = 16144336741327 is a prime.

It is a super-2 number, since 2×16161516610511² (a number of 27 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 (16161516610513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36236584106 + ... + 36236584551.

It is an arithmetic number, because the mean of its divisors is an integer number (4058497444848).

Almost surely, 2^{16161516610511} is an apocalyptic number.

16161516610511 is a deficient number, since it is larger than the sum of its proper divisors (72473168881).

16161516610511 is an equidigital number, since it uses as much as digits as its factorization.

16161516610511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72473168880.

The product of its (nonzero) digits is 32400, while the sum is 41.

The spelling of 16161516610511 in words is "sixteen trillion, one hundred sixty-one billion, five hundred sixteen million, six hundred ten thousand, five hundred eleven".