161098560 has 336 divisors, whose sum is σ = 648565632. Its totient is φ = 35942400.

The previous prime is 161098559. The next prime is 161098589. The reversal of 161098560 is 65890161.

161098560 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 98 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 1229695 + ... + 1229825.

Almost surely, 2^161098560 is an apocalyptic number.

161098560 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 161098560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324282816).

161098560 is an abundant number, since it is smaller than the sum of its proper divisors (487467072).

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

161098560 is a wasteful number, since it uses less digits than its factorization.

161098560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 161098560 is about 12692.4607543218. The cubic root of 161098560 is about 544.1231699189.

The spelling of 161098560 in words is "one hundred sixty-one million, ninety-eight thousand, five hundred sixty".