64163221043 has 4 divisors (see below), whose sum is σ = 64163728608. Its totient is φ = 64162713480.

The previous prime is 64163220991. The next prime is 64163221097. The reversal of 64163221043 is 34012236146.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64163221043 - 2¹⁰ = 64163220019 is a prime.

It is a super-2 number, since 2×64163221043² (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 (64163221643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103553 + ... + 372893.

It is an arithmetic number, because the mean of its divisors is an integer number (16040932152).

Almost surely, 2^64163221043 is an apocalyptic number.

64163221043 is a deficient number, since it is larger than the sum of its proper divisors (507565).

64163221043 is a wasteful number, since it uses less digits than its factorization.

64163221043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507564.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 64163221043 its reverse (34012236146), we get a palindrome (98175457189).

The spelling of 64163221043 in words is "sixty-four billion, one hundred sixty-three million, two hundred twenty-one thousand, forty-three".