64421364211 has 4 divisors (see below), whose sum is σ = 65513251800. Its totient is φ = 63329476624.

The previous prime is 64421364169. The next prime is 64421364269. The reversal of 64421364211 is 11246312446.

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

It is a cyclic number.

It is not a de Polignac number, because 64421364211 - 2¹¹ = 64421362163 is a prime.

It is a super-2 number, since 2×64421364211² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64421364281) 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, 545943706 + ... + 545943823.

It is an arithmetic number, because the mean of its divisors is an integer number (16378312950).

Almost surely, 2^64421364211 is an apocalyptic number.

64421364211 is a deficient number, since it is larger than the sum of its proper divisors (1091887589).

64421364211 is a wasteful number, since it uses less digits than its factorization.

64421364211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091887588.

The product of its digits is 27648, while the sum is 34.

Adding to 64421364211 its reverse (11246312446), we get a palindrome (75667676657).

The spelling of 64421364211 in words is "sixty-four billion, four hundred twenty-one million, three hundred sixty-four thousand, two hundred eleven".