161337472 has 32 divisors (see below), whose sum is σ = 322401600. Its totient is φ = 80421120.

The previous prime is 161337461. The next prime is 161337521. The reversal of 161337472 is 274733161.

161337472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 44197 + ... + 47707.

It is an arithmetic number, because the mean of its divisors is an integer number (10075050).

Almost surely, 2^161337472 is an apocalyptic number.

It is an amenable number.

161337472 is a deficient number, since it is larger than the sum of its proper divisors (161064128).

161337472 is an equidigital number, since it uses as much as digits as its factorization.

161337472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3884 (or 3872 counting only the distinct ones).

The product of its digits is 21168, while the sum is 34.

The square root of 161337472 is about 12701.8688388756. The cubic root of 161337472 is about 544.3920184730.

The spelling of 161337472 in words is "one hundred sixty-one million, three hundred thirty-seven thousand, four hundred seventy-two".