161605595111106 has 128 divisors (see below), whose sum is σ = 345720873738240. Its totient is φ = 50255211967488.

The previous prime is 161605595111087. The next prime is 161605595111117. The reversal of 161605595111106 is 601111595506161.

It is a super-2 number, since 2×161605595111106² (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 63 ways as a sum of consecutive naturals, for example, 258425146 + ... + 259049738.

It is an arithmetic number, because the mean of its divisors is an integer number (2700944326080).

Almost surely, 2^{161605595111106} is an apocalyptic number.

161605595111106 is an abundant number, since it is smaller than the sum of its proper divisors (184115278627134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161605595111106 is a wasteful number, since it uses less digits than its factorization.

161605595111106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625000.

The product of its (nonzero) digits is 243000, while the sum is 48.

The spelling of 161605595111106 in words is "one hundred sixty-one trillion, six hundred five billion, five hundred ninety-five million, one hundred eleven thousand, one hundred six".