4405877721 has 12 divisors (see below), whose sum is σ = 7273195072. Its totient is φ = 2517644376.

The previous prime is 4405877717. The next prime is 4405877747. The reversal of 4405877721 is 1277785044.

4405877721 is a `hidden beast` number, since 4 + 40 + 587 + 7 + 7 + 21 = 666.

It is not a de Polignac number, because 4405877721 - 2² = 4405877717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4405877761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34967221 + ... + 34967346.

Almost surely, 2^4405877721 is an apocalyptic number.

It is an amenable number.

4405877721 is a deficient number, since it is larger than the sum of its proper divisors (2867317351).

4405877721 is a wasteful number, since it uses less digits than its factorization.

4405877721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69934580 (or 69934577 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 45.

The square root of 4405877721 is about 66376.7860098694. The cubic root of 4405877721 is about 1639.3718743930.

The spelling of 4405877721 in words is "four billion, four hundred five million, eight hundred seventy-seven thousand, seven hundred twenty-one".