161605560106 has 16 divisors (see below), whose sum is σ = 257574622464. Its totient is φ = 75780944064.

The previous prime is 161605560101. The next prime is 161605560121. The reversal of 161605560106 is 601065506161.

It is a super-2 number, since 2×161605560106² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161605560101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8388090 + ... + 8407333.

It is an arithmetic number, because the mean of its divisors is an integer number (16098413904).

Almost surely, 2^161605560106 is an apocalyptic number.

161605560106 is a deficient number, since it is larger than the sum of its proper divisors (95969062358).

161605560106 is a wasteful number, since it uses less digits than its factorization.

161605560106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16795725.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 161605560106 in words is "one hundred sixty-one billion, six hundred five million, five hundred sixty thousand, one hundred six".