161701180110 has 96 divisors (see below), whose sum is σ = 430485539328. Its totient is φ = 42100067520.

The previous prime is 161701180103. The next prime is 161701180111. The reversal of 161701180110 is 11081107161.

It is a super-2 number, since 2×161701180110² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161701180111) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 535329 + ... + 781011.

It is an arithmetic number, because the mean of its divisors is an integer number (4484224368).

Almost surely, 2^161701180110 is an apocalyptic number.

161701180110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161701180110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215242769664).

161701180110 is an abundant number, since it is smaller than the sum of its proper divisors (268784359218).

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

161701180110 is a wasteful number, since it uses less digits than its factorization.

161701180110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245870 (or 245867 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 27.

Adding to 161701180110 its reverse (11081107161), we get a palindrome (172782287271).

The spelling of 161701180110 in words is "one hundred sixty-one billion, seven hundred one million, one hundred eighty thousand, one hundred ten".