1312516611 has 24 divisors (see below), whose sum is σ = 2167948640. Its totient is φ = 749575296.

The previous prime is 1312516591. The next prime is 1312516619. The reversal of 1312516611 is 1166152131.

1312516611 is a `hidden beast` number, since 1 + 31 + 2 + 5 + 16 + 611 = 666.

It is not a de Polignac number, because 1312516611 - 2⁷ = 1312516483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312516619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126621 + ... + 136593.

Almost surely, 2^1312516611 is an apocalyptic number.

1312516611 is a deficient number, since it is larger than the sum of its proper divisors (855432029).

1312516611 is a wasteful number, since it uses less digits than its factorization.

1312516611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12075 (or 12072 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1312516611 is about 36228.6711183284. The cubic root of 1312516611 is about 1094.8844038853.

Adding to 1312516611 its reverse (1166152131), we get a palindrome (2478668742).

The spelling of 1312516611 in words is "one billion, three hundred twelve million, five hundred sixteen thousand, six hundred eleven".