1326601643 has 8 divisors (see below), whose sum is σ = 1360959600. Its totient is φ = 1292403168.

The previous prime is 1326601621. The next prime is 1326601657. The reversal of 1326601643 is 3461066231.

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 1326601643 - 2¹⁰ = 1326600619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1326601673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22928 + ... + 56381.

It is an arithmetic number, because the mean of its divisors is an integer number (170119950).

Almost surely, 2^1326601643 is an apocalyptic number.

1326601643 is a deficient number, since it is larger than the sum of its proper divisors (34357957).

1326601643 is an equidigital number, since it uses as much as digits as its factorization.

1326601643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79741.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1326601643 is about 36422.5430605827. The cubic root of 1326601643 is about 1098.7869942758.

Adding to 1326601643 its reverse (3461066231), we get a palindrome (4787667874).

The spelling of 1326601643 in words is "one billion, three hundred twenty-six million, six hundred one thousand, six hundred forty-three".