1316644445 has 8 divisors (see below), whose sum is σ = 1622675544. Its totient is φ = 1024847424.

The previous prime is 1316644421. The next prime is 1316644481. The reversal of 1316644445 is 5444466131.

It can be written as a sum of positive squares in 4 ways, for example, as 489161689 + 827482756 = 22117^2 + 28766^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1316644445 - 2¹⁶ = 1316578909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1316644399 and 1316644408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3558314 + ... + 3558683.

It is an arithmetic number, because the mean of its divisors is an integer number (202834443).

Almost surely, 2^1316644445 is an apocalyptic number.

It is an amenable number.

1316644445 is a deficient number, since it is larger than the sum of its proper divisors (306031099).

1316644445 is an equidigital number, since it uses as much as digits as its factorization.

1316644445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7117039.

The product of its digits is 138240, while the sum is 38.

The square root of 1316644445 is about 36285.5955580172. The cubic root of 1316644445 is about 1096.0309979889.

The spelling of 1316644445 in words is "one billion, three hundred sixteen million, six hundred forty-four thousand, four hundred forty-five".