220406442064 has 20 divisors (see below), whose sum is σ = 449513139040. Its totient is φ = 104403051360.

The previous prime is 220406442029. The next prime is 220406442103. The reversal of 220406442064 is 460244604022.

It is a super-2 number, since 2×220406442064² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362510292 + ... + 362510899.

It is an arithmetic number, because the mean of its divisors is an integer number (22475656952).

Almost surely, 2^220406442064 is an apocalyptic number.

It is an amenable number.

220406442064 is an abundant number, since it is smaller than the sum of its proper divisors (229106696976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220406442064 is a wasteful number, since it uses less digits than its factorization.

220406442064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725021218 (or 725021212 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 220406442064 in words is "two hundred twenty billion, four hundred six million, four hundred forty-two thousand, sixty-four".