161751105846 has 128 divisors (see below), whose sum is σ = 398830417920. Its totient is φ = 48184250400.

The previous prime is 161751105839. The next prime is 161751105847. The reversal of 161751105846 is 648501157161.

161751105846 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 51 + 10 + 584 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161751105847) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8316385 + ... + 8335811.

It is an arithmetic number, because the mean of its divisors is an integer number (3115862640).

Almost surely, 2^161751105846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161751105846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199415208960).

161751105846 is an abundant number, since it is smaller than the sum of its proper divisors (237079312074).

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

161751105846 is a wasteful number, since it uses less digits than its factorization.

161751105846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19687 (or 19681 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 161751105846 in words is "one hundred sixty-one billion, seven hundred fifty-one million, one hundred five thousand, eight hundred forty-six".