449442771721 has 4 divisors (see below), whose sum is σ = 449690947344. Its totient is φ = 449194596100.

The previous prime is 449442771611. The next prime is 449442771731. The reversal of 449442771721 is 127177244944.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-449442771721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449442771731) 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, 124085095 + ... + 124088716.

It is an arithmetic number, because the mean of its divisors is an integer number (112422736836).

Almost surely, 2^449442771721 is an apocalyptic number.

It is an amenable number.

449442771721 is a deficient number, since it is larger than the sum of its proper divisors (248175623).

449442771721 is a wasteful number, since it uses less digits than its factorization.

449442771721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248175622.

The product of its digits is 3161088, while the sum is 52.

The spelling of 449442771721 in words is "four hundred forty-nine billion, four hundred forty-two million, seven hundred seventy-one thousand, seven hundred twenty-one".