161616161616158 has 32 divisors (see below), whose sum is σ = 247671549296640. Its totient is φ = 79060224928320.

The previous prime is 161616161616157. The next prime is 161616161616209. The reversal of 161616161616158 is 851616161616161.

It is a super-2 number, since 2×161616161616158² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161616161616157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3385104035 + ... + 3385151777.

It is an arithmetic number, because the mean of its divisors is an integer number (7739735915520).

Almost surely, 2^{161616161616158} is an apocalyptic number.

161616161616158 is a deficient number, since it is larger than the sum of its proper divisors (86055387680482).

161616161616158 is a wasteful number, since it uses less digits than its factorization.

161616161616158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60032.

The product of its digits is 1866240, while the sum is 56.

The spelling of 161616161616158 in words is "one hundred sixty-one trillion, six hundred sixteen billion, one hundred sixty-one million, six hundred sixteen thousand, one hundred fifty-eight".