64445111 has 4 divisors (see below), whose sum is σ = 64606224. Its totient is φ = 64284000.

The previous prime is 64445041. The next prime is 64445123. The reversal of 64445111 is 11154446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11154446 = 2 ⋅5577223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64445111 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79955 + ... + 80756.

It is an arithmetic number, because the mean of its divisors is an integer number (16151556).

Almost surely, 2^64445111 is an apocalyptic number.

64445111 is a deficient number, since it is larger than the sum of its proper divisors (161113).

64445111 is a wasteful number, since it uses less digits than its factorization.

64445111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161112.

The product of its digits is 1920, while the sum is 26.

The square root of 64445111 is about 8027.7712349070. The cubic root of 64445111 is about 400.9251730705.

Adding to 64445111 its reverse (11154446), we get a palindrome (75599557).

The spelling of 64445111 in words is "sixty-four million, four hundred forty-five thousand, one hundred eleven".