161766560 has 48 divisors (see below), whose sum is σ = 404661096. Its totient is φ = 60899328.

The previous prime is 161766557. The next prime is 161766593. The reversal of 161766560 is 65667161.

It can be written as a sum of positive squares in 4 ways, for example, as 153859216 + 7907344 = 12404^2 + 2812^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27017 + ... + 32456.

Almost surely, 2^161766560 is an apocalyptic number.

161766560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161766560 is an abundant number, since it is smaller than the sum of its proper divisors (242894536).

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

161766560 is a wasteful number, since it uses less digits than its factorization.

161766560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59505 (or 59497 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 161766560 is about 12718.7483660933. The cubic root of 161766560 is about 544.8742071431.

The spelling of 161766560 in words is "one hundred sixty-one million, seven hundred sixty-six thousand, five hundred sixty".