161605560111126 has 32 divisors (see below), whose sum is σ = 324173331631968. Its totient is φ = 53708154554880.

The previous prime is 161605560111103. The next prime is 161605560111133. The reversal of 161605560111126 is 621111065506161.

It is a super-2 number, since 2×161605560111126² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249136296 + ... + 249784116.

It is an arithmetic number, because the mean of its divisors is an integer number (10130416613499).

Almost surely, 2^{161605560111126} is an apocalyptic number.

161605560111126 is an abundant number, since it is smaller than the sum of its proper divisors (162567771520842).

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

161605560111126 is a wasteful number, since it uses less digits than its factorization.

161605560111126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771536.

The product of its (nonzero) digits is 64800, while the sum is 42.

The spelling of 161605560111126 in words is "one hundred sixty-one trillion, six hundred five billion, five hundred sixty million, one hundred eleven thousand, one hundred twenty-six".