4400421664 has 12 divisors (see below), whose sum is σ = 8663330214. Its totient is φ = 2200210816.

The previous prime is 4400421659. The next prime is 4400421673. The reversal of 4400421664 is 4661240044.

It can be written as a sum of positive squares in only one way, i.e., 3278707600 + 1121714064 = 57260^2 + 33492^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68756557 + ... + 68756620.

Almost surely, 2^4400421664 is an apocalyptic number.

It is an amenable number.

4400421664 is a deficient number, since it is larger than the sum of its proper divisors (4262908550).

4400421664 is a wasteful number, since it uses less digits than its factorization.

4400421664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137513187 (or 137513179 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 4400421664 is about 66335.6741429527. The cubic root of 4400421664 is about 1638.6948847238.

The spelling of 4400421664 in words is "four billion, four hundred million, four hundred twenty-one thousand, six hundred sixty-four".