449609778472 has 8 divisors (see below), whose sum is σ = 843018334650. Its totient is φ = 224804889232.

The previous prime is 449609778467. The next prime is 449609778473. The reversal of 449609778472 is 274877906944.

It can be written as a sum of positive squares in only one way, i.e., 424199505636 + 25410272836 = 651306^2 + 159406^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 449609778398 and 449609778407.

It is not an unprimeable number, because it can be changed into a prime (449609778473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28100611147 + ... + 28100611162.

Almost surely, 2^449609778472 is an apocalyptic number.

It is an amenable number.

449609778472 is a deficient number, since it is larger than the sum of its proper divisors (393408556178).

449609778472 is a wasteful number, since it uses less digits than its factorization.

449609778472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56201222315 (or 56201222311 counting only the distinct ones).

The product of its (nonzero) digits is 170698752, while the sum is 67.

The spelling of 449609778472 in words is "four hundred forty-nine billion, six hundred nine million, seven hundred seventy-eight thousand, four hundred seventy-two".