72448161 has 4 divisors (see below), whose sum is σ = 96597552. Its totient is φ = 48298772.

The previous prime is 72448157. The next prime is 72448171. The reversal of 72448161 is 16184427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72448161 - 2² = 72448157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72448111) 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 3 ways as a sum of consecutive naturals, for example, 12074691 + ... + 12074696.

It is an arithmetic number, because the mean of its divisors is an integer number (24149388).

Almost surely, 2^72448161 is an apocalyptic number.

It is an amenable number.

72448161 is a deficient number, since it is larger than the sum of its proper divisors (24149391).

72448161 is a wasteful number, since it uses less digits than its factorization.

72448161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24149390.

The product of its digits is 10752, while the sum is 33.

The square root of 72448161 is about 8511.6485477256. The cubic root of 72448161 is about 416.8781395497.

The spelling of 72448161 in words is "seventy-two million, four hundred forty-eight thousand, one hundred sixty-one".