220423521064 has 32 divisors (see below), whose sum is σ = 418935888000. Its totient is φ = 108713199232.

The previous prime is 220423521023. The next prime is 220423521079. The reversal of 220423521064 is 460125324022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71104 + ... + 667759.

It is an arithmetic number, because the mean of its divisors is an integer number (13091746500).

Almost surely, 2^220423521064 is an apocalyptic number.

It is an amenable number.

220423521064 is a deficient number, since it is larger than the sum of its proper divisors (198512366936).

220423521064 is a wasteful number, since it uses less digits than its factorization.

220423521064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739377 (or 739373 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 220423521064 its reverse (460125324022), we get a palindrome (680548845086).

The spelling of 220423521064 in words is "two hundred twenty billion, four hundred twenty-three million, five hundred twenty-one thousand, sixty-four".