4449378965 has 4 divisors (see below), whose sum is σ = 5339254764. Its totient is φ = 3559503168.

The previous prime is 4449378953. The next prime is 4449379007. The reversal of 4449378965 is 5698739444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 741908644 + 3707470321 = 27238^2 + 60889^2 .

It is a cyclic number.

It is not a de Polignac number, because 4449378965 - 2⁴ = 4449378949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444937892 + ... + 444937901.

It is an arithmetic number, because the mean of its divisors is an integer number (1334813691).

Almost surely, 2^4449378965 is an apocalyptic number.

It is an amenable number.

4449378965 is a deficient number, since it is larger than the sum of its proper divisors (889875799).

4449378965 is an equidigital number, since it uses as much as digits as its factorization.

4449378965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889875798.

The product of its digits is 26127360, while the sum is 59.

The square root of 4449378965 is about 66703.6653040895. The cubic root of 4449378965 is about 1644.7496365432.

The spelling of 4449378965 in words is "four billion, four hundred forty-nine million, three hundred seventy-eight thousand, nine hundred sixty-five".