64445161 has 4 divisors (see below), whose sum is σ = 70303824. Its totient is φ = 58586500.

The previous prime is 64445141. The next prime is 64445177. The reversal of 64445161 is 16154446.

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 64445161 - 2⁹ = 64444649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64445141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2929315 + ... + 2929336.

It is an arithmetic number, because the mean of its divisors is an integer number (17575956).

Almost surely, 2^64445161 is an apocalyptic number.

It is an amenable number.

64445161 is a deficient number, since it is larger than the sum of its proper divisors (5858663).

64445161 is a wasteful number, since it uses less digits than its factorization.

64445161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858662.

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

The square root of 64445161 is about 8027.7743490958. The cubic root of 64445161 is about 400.9252767570.

The spelling of 64445161 in words is "sixty-four million, four hundred forty-five thousand, one hundred sixty-one".