161180540928 has 448 divisors, whose sum is σ = 538012477440. Its totient is φ = 47244902400.

The previous prime is 161180540921. The next prime is 161180540929. The reversal of 161180540928 is 829045081161.

It is a happy number.

161180540928 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 80 + 540 + 9 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161180540921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75422676 + ... + 75424812.

Almost surely, 2^161180540928 is an apocalyptic number.

161180540928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161180540928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269006238720).

161180540928 is an abundant number, since it is smaller than the sum of its proper divisors (376831936512).

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

161180540928 is a wasteful number, since it uses less digits than its factorization.

161180540928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214 (or 2184 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 161180540928 in words is "one hundred sixty-one billion, one hundred eighty million, five hundred forty thousand, nine hundred twenty-eight".