161745858828156 has 96 divisors (see below), whose sum is σ = 398598186147840. Its totient is φ = 50907135557376.

The previous prime is 161745858828133. The next prime is 161745858828173. The reversal of 161745858828156 is 651828858547161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119221326 + ... + 120570378.

It is an arithmetic number, because the mean of its divisors is an integer number (4152064439040).

Almost surely, 2^{161745858828156} 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 161745858828156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199299093073920).

161745858828156 is an abundant number, since it is smaller than the sum of its proper divisors (236852327319684).

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

161745858828156 is a wasteful number, since it uses less digits than its factorization.

161745858828156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350835 (or 1350833 counting only the distinct ones).

The product of its digits is 1032192000, while the sum is 75.

The spelling of 161745858828156 in words is "one hundred sixty-one trillion, seven hundred forty-five billion, eight hundred fifty-eight million, eight hundred twenty-eight thousand, one hundred fifty-six".