161451760 has 40 divisors (see below), whose sum is σ = 378140976. Its totient is φ = 64104960.

The previous prime is 161451739. The next prime is 161451761. The reversal of 161451760 is 67154161.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161451761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3595 + ... + 18325.

Almost surely, 2^161451760 is an apocalyptic number.

161451760 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 161451760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189070488).

161451760 is an abundant number, since it is smaller than the sum of its proper divisors (216689216).

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

161451760 is a wasteful number, since it uses less digits than its factorization.

161451760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14881 (or 14875 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 161451760 is about 12706.3669079718. The cubic root of 161451760 is about 544.5205333366.

The spelling of 161451760 in words is "one hundred sixty-one million, four hundred fifty-one thousand, seven hundred sixty".