1311680816 has 10 divisors (see below), whose sum is σ = 2541381612. Its totient is φ = 655840400.

The previous prime is 1311680803. The next prime is 1311680857. The reversal of 1311680816 is 6180861131.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40990010 + ... + 40990041.

Almost surely, 2^1311680816 is an apocalyptic number.

1311680816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1311680816 is a deficient number, since it is larger than the sum of its proper divisors (1229700796).

1311680816 is an equidigital number, since it uses as much as digits as its factorization.

1311680816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81980059 (or 81980053 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1311680816 is about 36217.1342875165. The cubic root of 1311680816 is about 1094.6519514062.

The spelling of 1311680816 in words is "one billion, three hundred eleven million, six hundred eighty thousand, eight hundred sixteen".