1316601805 has 8 divisors (see below), whose sum is σ = 1672858872. Its totient is φ = 991323648.

The previous prime is 1316601787. The next prime is 1316601841. The reversal of 1316601805 is 5081066131.

It can be written as a sum of positive squares in 4 ways, for example, as 278022276 + 1038579529 = 16674^2 + 32227^2 .

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 1316601805 - 2⁷ = 1316601677 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 7 ways as a sum of consecutive naturals, for example, 7744632 + ... + 7744801.

It is an arithmetic number, because the mean of its divisors is an integer number (209107359).

Almost surely, 2^1316601805 is an apocalyptic number.

It is an amenable number.

1316601805 is a deficient number, since it is larger than the sum of its proper divisors (356257067).

1316601805 is a wasteful number, since it uses less digits than its factorization.

1316601805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15489455.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1316601805 is about 36285.0079922824. The cubic root of 1316601805 is about 1096.0191660762.

Adding to 1316601805 its reverse (5081066131), we get a palindrome (6397667936).

The spelling of 1316601805 in words is "one billion, three hundred sixteen million, six hundred one thousand, eight hundred five".