4474447681 has 4 divisors (see below), whose sum is σ = 4881215664. Its totient is φ = 4067679700.

The previous prime is 4474447639. The next prime is 4474447759. The reversal of 4474447681 is 1867444744.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4474447681 - 2⁹ = 4474447169 is a prime.

It is a super-2 number, since 2×4474447681² = 40041364100012555522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4474447981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203383975 + ... + 203383996.

It is an arithmetic number, because the mean of its divisors is an integer number (1220303916).

Almost surely, 2^4474447681 is an apocalyptic number.

It is an amenable number.

4474447681 is a deficient number, since it is larger than the sum of its proper divisors (406767983).

4474447681 is a wasteful number, since it uses less digits than its factorization.

4474447681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406767982.

The product of its digits is 2408448, while the sum is 49.

The square root of 4474447681 is about 66891.3124478807. The cubic root of 4474447681 is about 1647.8328059216.

The spelling of 4474447681 in words is "four billion, four hundred seventy-four million, four hundred forty-seven thousand, six hundred eighty-one".