161236080 has 60 divisors (see below), whose sum is σ = 541486920. Its totient is φ = 42996096.

The previous prime is 161236079. The next prime is 161236087. The reversal of 161236080 is 80632161.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161236087) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 111250 + ... + 112689.

It is an arithmetic number, because the mean of its divisors is an integer number (9024782).

Almost surely, 2^161236080 is an apocalyptic number.

161236080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161236080 is an abundant number, since it is smaller than the sum of its proper divisors (380250840).

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

161236080 is a wasteful number, since it uses less digits than its factorization.

161236080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223958 (or 223949 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 161236080 is about 12697.8769879063. The cubic root of 161236080 is about 544.2779541215.

The spelling of 161236080 in words is "one hundred sixty-one million, two hundred thirty-six thousand, eighty".