161648499550208 has 288 divisors, whose sum is σ = 363114225976320. Its totient is φ = 71344223354880.

The previous prime is 161648499550189. The next prime is 161648499550217. The reversal of 161648499550208 is 802055994846161.

It is a super-2 number, since 2×161648499550208² (a number of 29 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 6320059916 + ... + 6320085492.

It is an arithmetic number, because the mean of its divisors is an integer number (1260813284640).

Almost surely, 2^{161648499550208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161648499550208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181557112988160).

161648499550208 is an abundant number, since it is smaller than the sum of its proper divisors (201465726426112).

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

161648499550208 is a wasteful number, since it uses less digits than its factorization.

161648499550208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25831 (or 25764 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 68.

The spelling of 161648499550208 in words is "one hundred sixty-one trillion, six hundred forty-eight billion, four hundred ninety-nine million, five hundred fifty thousand, two hundred eight".