161065006650 has 72 divisors (see below), whose sum is σ = 432924131484. Its totient is φ = 42931200000.

The previous prime is 161065006649. The next prime is 161065006709. The reversal of 161065006650 is 56600560161.

It can be written as a sum of positive squares in 6 ways, for example, as 139002954561 + 22062052089 = 372831^2 + 148533^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 926650 + ... + 1086650.

Almost surely, 2^161065006650 is an apocalyptic number.

161065006650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161065006650 is an abundant number, since it is smaller than the sum of its proper divisors (271859124834).

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

161065006650 is a wasteful number, since it uses less digits than its factorization.

161065006650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162256 (or 162248 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 161065006650 in words is "one hundred sixty-one billion, sixty-five million, six thousand, six hundred fifty".