64444442222222 has 16 divisors (see below), whose sum is σ = 101754539625600. Its totient is φ = 30526267586040.

The previous prime is 64444442222221. The next prime is 64444442222249. The reversal of 64444442222222 is 22222224444446.

It is a super-2 number, since 2×64444442222222² (a number of 28 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64444442222221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43735679 + ... + 45185157.

It is an arithmetic number, because the mean of its divisors is an integer number (6359658726600).

Almost surely, 2^{64444442222222} is an apocalyptic number.

64444442222222 is a deficient number, since it is larger than the sum of its proper divisors (37310097403378).

64444442222222 is a wasteful number, since it uses less digits than its factorization.

64444442222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619511.

The product of its digits is 3145728, while the sum is 44.

Adding to 64444442222222 its reverse (22222224444446), we get a palindrome (86666666666668).

The spelling of 64444442222222 in words is "sixty-four trillion, four hundred forty-four billion, four hundred forty-two million, two hundred twenty-two thousand, two hundred twenty-two".