449078612621 has 2 divisors, whose sum is σ = 449078612622. Its totient is φ = 449078612620.

The previous prime is 449078612617. The next prime is 449078612623. The reversal of 449078612621 is 126216870944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432357536521 + 16721076100 = 657539^2 + 129310^2 .

It is a cyclic number.

It is not a de Polignac number, because 449078612621 - 2² = 449078612617 is a prime.

Together with 449078612623, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 449078612621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449078612623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224539306310 + 224539306311.

It is an arithmetic number, because the mean of its divisors is an integer number (224539306311).

Almost surely, 2^449078612621 is an apocalyptic number.

It is an amenable number.

449078612621 is a deficient number, since it is larger than the sum of its proper divisors (1).

449078612621 is an equidigital number, since it uses as much as digits as its factorization.

449078612621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 449078612621 in words is "four hundred forty-nine billion, seventy-eight million, six hundred twelve thousand, six hundred twenty-one".