161105760 has 240 divisors, whose sum is σ = 588373632. Its totient is φ = 41472000.

The previous prime is 161105741. The next prime is 161105761. The reversal of 161105760 is 67501161.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161105761) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 401560 + ... + 401960.

Almost surely, 2^161105760 is an apocalyptic number.

161105760 is a gapful number since it is divisible by the number (10) 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 161105760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294186816).

161105760 is an abundant number, since it is smaller than the sum of its proper divisors (427267872).

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

161105760 is a wasteful number, since it uses less digits than its factorization.

161105760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 161105760 is about 12692.7443840960. The cubic root of 161105760 is about 544.1312759886.

The spelling of 161105760 in words is "one hundred sixty-one million, one hundred five thousand, seven hundred sixty".