161616151115065 has 32 divisors (see below), whose sum is σ = 197684772848640. Its totient is φ = 126821426409216.

The previous prime is 161616151115059. The next prime is 161616151115119. The reversal of 161616151115065 is 560511151616161.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 161616151115065 - 2⁷ = 161616151114937 is a prime.

It is a super-2 number, since 2×161616151115065² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32178331 + ... + 36860239.

It is an arithmetic number, because the mean of its divisors is an integer number (6177649151520).

Almost surely, 2^{161616151115065} is an apocalyptic number.

It is an amenable number.

161616151115065 is a deficient number, since it is larger than the sum of its proper divisors (36068621733575).

161616151115065 is a wasteful number, since it uses less digits than its factorization.

161616151115065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682593.

The product of its (nonzero) digits is 162000, while the sum is 46.

The spelling of 161616151115065 in words is "one hundred sixty-one trillion, six hundred sixteen billion, one hundred fifty-one million, one hundred fifteen thousand, sixty-five".