161500555606 has 16 divisors (see below), whose sum is σ = 260894731104. Its totient is φ = 74536084224.

The previous prime is 161500555583. The next prime is 161500555613. The reversal of 161500555606 is 606555005161.

It is a super-2 number, since 2×161500555606² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774751 + ... + 960853.

It is an arithmetic number, because the mean of its divisors is an integer number (16305920694).

Almost surely, 2^161500555606 is an apocalyptic number.

161500555606 is a deficient number, since it is larger than the sum of its proper divisors (99394175498).

161500555606 is a wasteful number, since it uses less digits than its factorization.

161500555606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219495.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 161500555606 in words is "one hundred sixty-one billion, five hundred million, five hundred fifty-five thousand, six hundred six".