64420111 has 4 divisors (see below), whose sum is σ = 73622992. Its totient is φ = 55217232.

The previous prime is 64420067. The next prime is 64420117. The reversal of 64420111 is 11102446.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64420111 - 2⁷ = 64419983 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 (64420117) 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, 4601430 + ... + 4601443.

It is an arithmetic number, because the mean of its divisors is an integer number (18405748).

Almost surely, 2^64420111 is an apocalyptic number.

64420111 is a deficient number, since it is larger than the sum of its proper divisors (9202881).

64420111 is an equidigital number, since it uses as much as digits as its factorization.

64420111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9202880.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 64420111 is about 8026.2139891732. The cubic root of 64420111 is about 400.8733231291.

Adding to 64420111 its reverse (11102446), we get a palindrome (75522557).

The spelling of 64420111 in words is "sixty-four million, four hundred twenty thousand, one hundred eleven".