64161445 has 4 divisors (see below), whose sum is σ = 76993740. Its totient is φ = 51329152.

The previous prime is 64161431. The next prime is 64161463. The reversal of 64161445 is 54416146.

64161445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54416146 = 2 ⋅27208073.

It can be written as a sum of positive squares in 2 ways, for example, as 9431041 + 54730404 = 3071^2 + 7398^2 .

It is a cyclic number.

It is not a de Polignac number, because 64161445 - 2²¹ = 62064293 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6416140 + ... + 6416149.

It is an arithmetic number, because the mean of its divisors is an integer number (19248435).

Almost surely, 2^64161445 is an apocalyptic number.

It is an amenable number.

64161445 is a deficient number, since it is larger than the sum of its proper divisors (12832295).

64161445 is a wasteful number, since it uses less digits than its factorization.

64161445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832294.

The product of its digits is 11520, while the sum is 31.

The square root of 64161445 is about 8010.0839571131. The cubic root of 64161445 is about 400.3360613279.

The spelling of 64161445 in words is "sixty-four million, one hundred sixty-one thousand, four hundred forty-five".