161148409 has 8 divisors (see below), whose sum is σ = 165916800. Its totient is φ = 156420000.

The previous prime is 161148347. The next prime is 161148437. The reversal of 161148409 is 904841161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161148409 - 2²¹ = 159051257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161148469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1717 + ... + 18034.

It is an arithmetic number, because the mean of its divisors is an integer number (20739600).

Almost surely, 2^161148409 is an apocalyptic number.

It is an amenable number.

161148409 is a deficient number, since it is larger than the sum of its proper divisors (4768391).

161148409 is a wasteful number, since it uses less digits than its factorization.

161148409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19991.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 161148409 is about 12694.4243272391. The cubic root of 161148409 is about 544.1792871155.

The spelling of 161148409 in words is "one hundred sixty-one million, one hundred forty-eight thousand, four hundred nine".