161585060 has 96 divisors (see below), whose sum is σ = 426746880. Its totient is φ = 50024448.

The previous prime is 161585057. The next prime is 161585069. The reversal of 161585060 is 60585161.

It is a happy number.

It is a super-2 number, since 2×161585060² = 52219463230407200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161585069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84596 + ... + 86484.

It is an arithmetic number, because the mean of its divisors is an integer number (4445280).

Almost surely, 2^161585060 is an apocalyptic number.

161585060 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 161585060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213373440).

161585060 is an abundant number, since it is smaller than the sum of its proper divisors (265161820).

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

161585060 is a wasteful number, since it uses less digits than its factorization.

161585060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1963 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 161585060 is about 12711.6112275352. The cubic root of 161585060 is about 544.6703502647.

The spelling of 161585060 in words is "one hundred sixty-one million, five hundred eighty-five thousand, sixty".