449649263872 has 18 divisors (see below), whose sum is σ = 897542085818. Its totient is φ = 224824631808.

The previous prime is 449649263831. The next prime is 449649263873. The reversal of 449649263872 is 278362946944.

It can be written as a sum of positive squares in only one way, i.e., 365512139776 + 84137124096 = 604576^2 + 290064^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449649263873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 878220963 + ... + 878221474.

Almost surely, 2^449649263872 is an apocalyptic number.

It is an amenable number.

449649263872 is a deficient number, since it is larger than the sum of its proper divisors (447892821946).

449649263872 is an equidigital number, since it uses as much as digits as its factorization.

449649263872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756442453 (or 1756442439 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 64.

The spelling of 449649263872 in words is "four hundred forty-nine billion, six hundred forty-nine million, two hundred sixty-three thousand, eight hundred seventy-two".