161282560 has 60 divisors (see below), whose sum is σ = 388246914. Its totient is φ = 64256000.

The previous prime is 161282531. The next prime is 161282603. The reversal of 161282560 is 65282161.

It can be written as a sum of positive squares in only one way, i.e., 145154304 + 16128256 = 12048^2 + 4016^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 642435 + ... + 642685.

Almost surely, 2^161282560 is an apocalyptic number.

161282560 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 161282560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194123457).

161282560 is an abundant number, since it is smaller than the sum of its proper divisors (226964354).

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

161282560 is an frugal number, since it uses more digits than its factorization.

161282560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 161282560 is about 12699.7070832362. The cubic root of 161282560 is about 544.3302493000.

Multiplying 161282560 by its product of nonzero digits (5760), we get a square (928987545600 = 963840²).

The spelling of 161282560 in words is "one hundred sixty-one million, two hundred eighty-two thousand, five hundred sixty".