161616150051665 has 16 divisors (see below), whose sum is σ = 200907928613376. Its totient is φ = 124676905987200.

The previous prime is 161616150051623. The next prime is 161616150051691. The reversal of 161616150051665 is 566150051616161.

It is not a de Polignac number, because 161616150051665 - 2⁸ = 161616150051409 is a prime.

It is a super-2 number, since 2×161616150051665² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1855267547 + ... + 1855354656.

It is an arithmetic number, because the mean of its divisors is an integer number (12556745538336).

Almost surely, 2^{161616150051665} is an apocalyptic number.

It is an amenable number.

161616150051665 is a deficient number, since it is larger than the sum of its proper divisors (39291778561711).

161616150051665 is a wasteful number, since it uses less digits than its factorization.

161616150051665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710622520.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 161616150051665 in words is "one hundred sixty-one trillion, six hundred sixteen billion, one hundred fifty million, fifty-one thousand, six hundred sixty-five".